A function room in a pub with patterned carpet, wooden tables, warm lighting, and TVs at O'Neill's Trinity Street Cardiff.
A pub function room with long wooden tables, bench seating, TV screens, and exposed bulb lighting at O'Neill's Trinity Street Cardiff.
A function room with round wooden tables, patterned carpet, and wall-mounted TV at O'Neill's Trinity Street Cardiff.
A function room with hanging Edison bulbs, wooden tables, and patterned flooring at O'Neill's Trinity Street Cardiff.
A function room with wooden tables, patterned carpet, string lights, and green walls at O'Neill's Trinity Street Cardiff.
A function room in a pub with exposed brick walls, wooden paneling, and a stocked bar at O'Neill's Trinity Street Cardiff.
A function room with long wooden tables, cushioned benches, and hanging exposed bulbs at O'Neill's Trinity Street Cardiff.
A function room with long wooden tables set for a meeting, exposed bulbs, and a private bar at O'Neill's Trinity Street Cardiff.
A function room in a pub with a long table, benches, flip chart, and wall-mounted TV at O'Neill's Trinity Street Cardiff.
A function room with glass bottles of Harrogate spring water arranged on a wooden table at O'Neill's Trinity Street Cardiff.
A function room in a pub with a wooden table, markers, sticky notes, and tape at O'Neill's Trinity Street Cardiff.
A function room with long wooden tables, cushioned chairs, and bottled water at O'Neill's Trinity Street Cardiff.
A function room with a long wooden table set with notepads, bottled water, and glasses at O'Neill's Trinity Street Cardiff.
A pub function room with long wooden tables set with water bottles, glasses, and papers at O'Neill's Trinity Street Cardiff.
A pub function room with long wooden tables, padded benches, water glasses, and note paper at O'Neill's Trinity Street Cardiff.
A pub exterior with black facade, branded awnings, outdoor tables, and yellow chairs at O'Neill's Trinity Street Cardiff.
A bar with chilled Peroni beer bottles in white ice buckets at O'Neill's Trinity Street Cardiff.
A bar with bottles of Moët champagne and two empty wine glasses at O'Neill's Trinity Street Cardiff.
Bar snacks with nachos topped with jalapenos and a glass of draft beer at O'Neill's Trinity Street Cardiff.
A pub bar with a pepperoni pizza in the foreground and baskets of fries and sides at O'Neill's Trinity Street Cardiff.
A pub table with tortilla wraps filled with ham and lettuce alongside tortilla chips at O'Neill's Trinity Street Cardiff.
Bar bites including glazed chicken wings and mini burgers with lettuce at O'Neill's Trinity Street Cardiff.
A pub setting with fried snacks, dipping sauce, and hand-held appetizers at O'Neill's Trinity Street Cardiff.
A bar with a neon sign on herringbone tile and backlit liquor bottles at O'Neill's Trinity Street Cardiff.

Private Upstairs Room at O'Neill's Trinity Street Cardiff

Function Room in a Pub
·
Private space
20-21 Trinity Street, Cardiff, CF10 1BH –
Cardiff Centre
Up to 40
seats
Up to 100
standing
Venue offers catering
External catering not allowed

About this space

The Private Upstairs Room is a Function Room in O'Neill's Trinity Street Cardiff and has a compact, bar-centred layout that creates a private space above the main pub.

Design: The room has exposed brick and dark wood panelling, a low coffered ceiling and warm pendant lighting that keep sightlines short and the layout intimate.

Features: The room includes a PA system and speakers, and it allows hosts to play their own music or bring an external DJ; a cleared area functions as a small dance floor. The room also provides Wi‑Fi, air conditioning and natural daylight.

Ideal for: Groups seeking a lively, informal setting for standing receptions or relaxed seated gatherings where music and mingling are central.

What guests say: The space has a mix of high and low tables and a straightforward, unpretentious decor. The space maintains background music at a volume that still allows conversation.

Offers and packages

Menus

 Drinks menu
Christmas menu

Prices

Monday
11:00 – 23:00
from £200 min. spend
Per session
11:00 – 23:00
from £200 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Tuesday
11:00 – 23:00
from £200 min. spend
Per session
11:00 – 23:00
from £200 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Wednesday
11:00 – 23:00
from £200 min. spend
Per session
11:00 – 23:00
from £200 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Thursday
11:00 – 23:00
from £200 min. spend
Per session
11:00 – 23:00
from £200 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Friday
9:00 – 0:00
from £200–£500 min. spend
Per session
9:00 – 17:00
from £200 min. spend
Per session
17:00 – 0:00
from £500 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Saturday
9:00 – 0:00
from £500 min. spend
Per session
9:00 – 17:00
from £500 min. spend
Per session
17:00 – 0:00
from £500 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Sunday
11:00 – 22:00
from £200 min. spend
Per session
11:00 – 22:00
from £200 min. spend
Alcohol licence until 2:00. Extension available. All prices include VAT.
Best price guarantee
Pricing updated by venue 4 months ago
Pricing rated as accurate by 1 verified user

Capacity

  • Standing
    up to 100
  • Dining
    up to 40
  • Theatre
    up to 30
  • Boardroom
    up to 30
  • U-Shaped
    up to 30
  • Classroom
    up to 30

Catering and drinks

In-house catering available Venue can organise food and drink
Extensive vegan menu
Extensive vegetarian menu
American cuisine
No external catering allowed
Venue provides alcohol Venue can supply alcoholic beverages
No BYO alcohol allowed

Facilities

  • Wi-Fi available
  • Flatscreen TV
  • Flipchart
  • PA system / speakers Venue provides a sound system for music and announcements
  • Conference call facilities Equipment for video or phone conferencing during your event
  • Air conditioner
  • Natural light Room has windows or a skylight, so daylight comes in
  • Quiet space
  • Dance floor Dedicated dance floor area
  • Paid parking facilities available nearby
  • Unavailable: Projector
  • Unavailable: Whiteboard
  • Unavailable: Photo equipment
  • Unavailable: Video equipment
  • Unavailable: Lighting equipment
  • Unavailable: Greenscreen
  • Unavailable: Backdrops
  • Unavailable: Storage space
  • Unavailable: Soundproof
  • Unavailable: Mirrors
  • Unavailable: Accommodation is available on-site

Music & sound equipment

  • Play your own music Venue allows playing your own music
  • Bring your own DJ Venue allows bringing your own DJ instead
  • No noise restrictions

Accessibility

  • Unavailable: Accessible toilets
  • Unavailable: Ground level
  • Unavailable: Accessible parking spot available
  • Unavailable: Lift to all floors
  • Unavailable: Cargo lift
  • Unavailable: Wheelchair accessible

Rules of the space

Allowed events

  • No promoted and ticketed events allowed
  • Temporary Event Notices (TENs) available
  • No wedding licence

Age policy

Guests under 18 are not allowed after 20:00

Host rules

-No smoking in the building
-No external catering allowed
-No BYOB
-Under 18's allowed in the venue until 8pm

Cancellation policy: Standard 30 day

Show cancellation details

Reviews and ratings

(11 reviews and ratings - )

Verified reviews come from Tagvenue users. All reviews are checked by our team to uphold our trust and safety standards.

JB
Julie B.
Verified review
Pub · 50 guests · September 2026

City centre venue

The deposit was misleading. I had to claim back money from my friends. I didnt realise the deposit was a bar tab and not returnable until I arrived

3.8
VW
Verity W.
Verified review
Bar · 50 guests · May 2026

We had a FANTASTIC evening here. From start to finish everything went smoothly. The Gold buffet package was outstanding, the food was gorgeous. Our bartenders were so so lovely and accomodating, and we were able to run our evening exactly as we wanted. We have since uploaded photos onto our social media, and it looked so amazing that another society messaged to ask where we had it etc as it looked so good! All-in-all would highly recommend this venue, the communication prior was very good, and the whole evening went exactly as hoped.

nothing!

5.0
CD
Christopher D.
Verified review
Pub · 60 guests · September 2025

Great size venue for our party and brilliant location. The staff were fantastic, great food and attentive to what we needed

5.0
KC
Katherine C.
Verified review
Event Space · 40 guests · August 2025

Everything

Nothing

5.0

FAQ

Yes, guests can bring their own musicians, including singers and guitarists.

Yes, clients may source their own DJ or bring a device with a playlist to connect and play their own music.

Yes, photos can be displayed on the venue's screen.

Yes, decorations are allowed provided they do not damage the venue and are removed at the end of the evening, as there is limited storage. External vendors may supply decorations.

O'Neill's Trinity Street Cardiff is a #Supervenue

#Supervenue program is based on our customers' feedback and highlights venues that are most dedicated to providing outstanding hospitality, customer service and event experience. Read more
Customers rated communication with this venue and their event experience as Superb
Response time: within a couple of hours
Response rate: 92%

About O'Neill's Trinity Street Cardiff

O'Neill's Trinity Street Cardiff is a Trusted Tagvenue Partner, validated by the Tagvenue team with a record of successful bookings on the platform.

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Location

Location map

Meet your host

Prabs Ragbotra
Member of Tagvenue since February 2025
11 Reviews
4.8 Rating
1h Response time
100% Response rate

Contact venue managers directly on Tagvenue. Keep all event communication on the platform for a secure, seamless booking.

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