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Top 21st Birthday Venues in Cardiff
Turning 21 is a milestone, so whether you’re planning a grand celebration with hundreds or a laid-back dinner with a few lucky friends, we’ve got you covered. Head to indie hangouts on Kelham Island for a fun night or cosy cocktail bars on West Street for a birthday happy hour. For a big birthday bash, explore the party halls in the city centre, or choose sunny rooftop terraces and beer gardens on Ecclesall Road for a summer celebration. These venues will guarantee you have a blast on your special day! Browse, compare, and shortlist the best 21st birthday venues in Cardiff. Once you find the perfect spot, seal the deal and get ready to party!
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![Rockpools Dining Area at The Botanist Cardiff Bay in Cardiff]()
from £38
per person / per sessionCheck availabilityRockpools Dining Area
30 guestsThe Botanist Cardiff BayCardiffHHelena K.
“28 of us celebrated a special birthday at the rock pool area. Food and drinks were lovely. ” -
![Upper Level at Be At One Cardiff in Cardiff Centre]()
from £250
minimum spend / per sessionCheck availabilityUpper Level
100 guestsBe At One CardiffCardiff CentreAt Be At One Cardiff, our Upper Level offers the perfect space for your next private event. Whether youre hosting a corporate function, a birthday celebration, or a festive Christmas party, this exclusive area provides a -
![Private Upstairs Room at O'Neill's Trinity Street Cardiff in Cardiff Centre]()
from £200
minimum spend / per sessionCheck availabilityPrivate Upstairs Room
70 guestsO'Neill's Trinity Street CardiffCardiff Centre
#Supervenue
DDaniel H.
“Venue was great size, bar staff were brilliant ” -
![Bar 3 at Bonnie Rogues Pub in Cardiff Centre]()
from £250
minimum spend / per sessionCheck availabilityBar 3
120 guestsBonnie Rogues PubCardiff CentreMMartina F.
“Excellent space! In the mix so we still benefitted from the atmosphere of the bar, and easy access to drinks. ” -
![Club Room at Revolution Cardiff in Cardiff Centre]()
from £500
minimum spend / per sessionCheck availabilityClub Room
400 guestsRevolution CardiffCardiff CentreDDamian M.
“Great size room, helpful sales manager, good selection of food and decent quality ” -
![PARTY AND EVENT VENUE at DNC BAR in Cardiff Centre]()
from £70
hire fee / per hourCheck availabilityPARTY AND EVENT VENUE
120 guestsDNC BARCardiff Centre
#Supervenue
The second-floor function room is available for hire with its own entrance, bar, bathrooms, sound system, and all the necessary comforts for any event. -
![Whole Venue at The Athenian Tree in Cardiff Outskirts]()
from £25
per person / per sessionCheck availabilityWhole Venue
64 guestsThe Athenian TreeCardiff OutskirtsThe whole restaurant can seat up to 40 patrons for an engagement party, birthday dinner, celebratory function, or other private event. The interior decor is neutral and in keeping with the general casual vibe. -
![Bar Two at Revolution Cardiff in Cardiff Centre]()
from £1000
minimum spend / per afternoonCheck availabilityBar Two
80 guestsRevolution CardiffCardiff CentreBar Two is yet another beautiful event space in Revolution Cardiff, offering an "inside/outside" feel with its botanical decor and light, airy atmosphere. -
![Full Venue Hire at Tonight Josephine Cardiff in Cardiff Centre]()
from £1500
minimum spend / per sessionCheck availabilityFull Venue Hire
220 guestsTonight Josephine CardiffCardiff CentreTonight Josephine Cardiff offers a unique event and party space that spans two floors, and is the first bar to sport Josephines newest look. With updated neons, daring green hues and disco balls galore its the ideal hangout -
![Private Dining Room at Chai Social in Cardiff Outskirts]()
from £25
per person / per sessionCheck availabilityPrivate Dining Room
40 guestsChai SocialCardiff OutskirtsOur gorgeous private garden room with its own private bar and chill-out area is available for parties, birthday celebrations, meetings, get-togethers, celebrations, small or large dinners, baby showers. -
![Downstairs at Prego Wine Bar in Cardiff Centre]()
from £10
per person / per sessionCheck availabilityDownstairs
72 guestsPrego Wine BarCardiff CentreThe downstairs at Prego Wine Bar can host up to 45 guests. This space is fit for smaller gatherings. There are couches and tables available. -
![Brewery at Mad Dog Brewery Co. Taproom - Cardiff in Cardiff Centre]()
from £5000
hire fee / per sessionCheck availabilityBrewery
120 guestsMad Dog Brewery Co. Taproom - CardiffCardiff CentreThe capacity of the whole venue is 120. The space consists of a bar and benches. It's a match for parties, and going out for drinks with friends.
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Capacity
Budget
Area type
Venue type
Catering and drinks
Accessibility features
Enjoy Cardiff's Small 21st Birthday Venues
from £80
hire fee / per afternoon
hire fee / per afternoon
Cabin 2
45
55
Lo Lounge
Cardiff
#Supervenue
Looking for a unique private venue? Our three cozy shipping containers at Lo Lounge offer a stylish, weatherproof space for up to 45 guestsperfect for celebrations, meetings, or casual gatherings.
from £500
minimum spend / per evening
minimum spend / per evening
The Green Room
50
The Piano Works Cardiff
Cardiff Centre
The space features a private bar, intimate booth seating, and high tables, all framed by rich textures, geometric prints, and a striking monochrome floor that makes a visual statement.
from £85
hire fee / per session
hire fee / per session
VIP Gallery
30
50
Mocka Lounge
Cardiff Centre
Mocka Lounge is a cocktail bar in Cardiff with several areas available for private hire. Live music sessions, DJs, dancing, and partying till late night happen daily.
from £500
hire fee / per session
hire fee / per session
Semi Private
30
40
Mad Dog Brewery Co. Taproom - Cardiff
Cardiff Centre
The semi-private space at Mad Dog Brewery can accommodate up to 30 - 40 guests. It's a fit for smaller parties.
from £39
per person / per session
per person / per session
Entire Venue
55
55
Alcotraz Cardiff
Cardiff Centre
If you are looking for a unique and fun venue for your next corporate event, then look no further than Alcotraz. This is not a physical experience so everyone can be a part of it and we make the best mocktails for those not
from £25
per person / per session
per person / per session
Main Dining
35
40
Chai Social
Cardiff Outskirts
Chai Social is a casual eatery offering Indian-inspired street food, chai, and desserts in Cardiff. The space has a colorful, modern design with cozy seating, and is great for group meals or casual meetups.
Book One of Cardiff's Cheap 21st Birthday Venues
from £750
minimum spend / per session
minimum spend / per session
Restaurant & Bar
100
150
Zerodegrees Microbrewery Restaurant Cardiff
Cardiff Centre
It offers a lively atmosphere with freshly brewed craft beers and a menu featuring wood-fired pizzas, seafood, and pasta. The venue is ideal for group gatherings, celebrations, and casual dining.
from £750
minimum spend / per session
minimum spend / per session
Tank Lounge
40
80
Zerodegrees Microbrewery Restaurant Cardiff
Cardiff Centre
Tank Lounge can welcome up to 80 guests conveniently. It offers a lively atmosphere with freshly brewed craft beers and a menu featuring wood-fired pizzas, seafood, and pasta.
from £25
minimum spend / per session
minimum spend / per session
Restaurant Hire
250
250
Browns Marriott Cardiff
Cardiff Centre
Browns Brasserie, located within the Cardiff Marriott Hotel, offers a stylish dining experience in the heart of Cardiff. The interior design is inspired by the glamour of the 1920s, featuring art deco styling, luxurious furnishings,
from £80
hire fee / per afternoon
hire fee / per afternoon
Cabin 3
45
45
Lo Lounge
Cardiff
#Supervenue
Host your next gathering in one of Lo Lounges unique private shipping containers! Each stylishly designed space offers seating for up to 45 guests, cozy furnishings and direct access to our outdoor bar.
from £100
minimum spend / per session
minimum spend / per session
Top Bar
80
200
Slug and Lettuce Cardiff Central
Cardiff Centre
Slug and Lettuce Cardiff Central is a modern and floral oasis, dedicated to all things beautiful and bloomed. Ideally located within a few minutes walk from Cardiff station and on the busiest street in town, this restaurant
from £250
minimum spend / per session
minimum spend / per session
Rhythm Room
70
150
Walkabout Cardiff
Cardiff Centre
Enjoy the convenience of your own private bar, where our friendly staff will cater to your needs. The room features multiple TV screens, ideal for presentations or entertainment.
Celebrate at Top Bars for Birthday Parties
from £80
hire fee / per afternoon
hire fee / per afternoon
Cabin 1
45
45
Lo Lounge
Cardiff
#Supervenue
With direct access to the outdoor bar and stunning Cardiff Bay views, theyre perfect for both business and leisure. Book your private space today!
from £30
per person / per session
per person / per session
Upstairs
200
250
Par 59 Cardiff
Cardiff Centre
Interactive darts and shuffle boards are available for guests to play and they have access to a private bar. For meetings/presentations, an area for up 80 guests has access to a large screen, mic and PA system.
from £500
minimum spend / per session
minimum spend / per session
Top Floor Private Room
100
Tonight Josephine Cardiff
Cardiff Centre
Our top floor bar is the perfect space for a private event. With plenty of seating, space for dancing and a great neon photo op you can host the event of the season in our Top Floor Bar.
from £400
hire fee / per session
hire fee / per session
Entire Venue
62
100
Prego Wine Bar
Cardiff Centre
The Entire Venue at Prego Wine Bar can host up to 100 guests. It is fit for larger parties, corporate receptions, and family gatherings. There are tables and chairs available.
from £175
hire fee / per session
hire fee / per session
The Bar Area
26
44
Chance & Counters - Board Game Café
Cardiff Centre
The bar area is a dynamic space that also seats up to 44 guests and offers a welcoming environment with a great selection of drinks and tasty treats. Whether you're here for a game night, a few drinks or a bite to eat, it's
from £5400
minimum spend / per session
minimum spend / per session
The Champion of the World
187
300
Flight Club Cardiff
Cardiff Centre
A great private event space for groups of up to 300 with 5 oches, 2 gamesmasters, 2 private bars and exclusive use of the roof terrace
FAQs about Top 21st Birthday Venues in Cardiff
In Cardiff, prices of 21st birthday venues average £750 minimum spend per event. Costs vary depending on guest capacity, popularity, location, and amenities like sound systems or bar services. Extra charges may apply for custom catering, decor, or event planning services. Packages with add-ons, such as DJs, photo booths, or other entertainment services, can also increase the overall cost. Check out the typical price ranges in Cardiff, based on Tagvenue data:
| From £400 | to £1600 | minimum spend per event |
| From £30 | to £35 | per person |
| From £125 | to £500 | hire fee per event |
Consider capacity, location, and atmosphere when selecting a venue for your 21st birthday party. Think about whether you want a lively party or something more private. For a comprehensive guide on choosing the right venue, check out our How to Choose a Venue guide, which covers everything from budget to amenities.
Venue booking prices normally include the use of the space for your event, basic furniture (like tables and chairs), and sometimes access to AV equipment. Additional services, such as catering or decoration, may incur extra costs, so it's essential to clarify what's included in the price with the venue manager when booking your venue.
- Dirty Martini Cardiff: A stylish cocktail bar perfect for a chic birthday soiree. It has a standing capacity of 50 and is ideal for celebrations with close friends and family.
- Bonnie Rogues Pub: This cosy and lively pub can accommodate up to 40 seated guests. It is great for late-night birthday parties and offers delicious burgers and drinks.
- Be At One Cardiff: This lively chain bar is great for small groups of 30 guests looking to enjoy a fun cocktail experience. You can add a cocktail masterclass to your b-day celebrations to make your event extra special.
