Upstairs Room at O'Neill's St Mary Street Cardiff

Event Space in a Pub
·
Private space
85-87 St Mary St, Cardiff, Cardiff, CF10 1DW
Cardiff Centre

About this space

Our first-floor space at O'Neill's St Mary Street is the ideal venue for any occasion—whether it's a meeting, an all-day conference, a Christmas or engagement party, a milestone birthday, a networking event, a live music night, or even stand-up comedy. With a capacity of up to 300 standing, the room features a private bar, multiple screens, a projector, a flip chart, and a full PA system.

This flexible venue can be tailored to suit any event, whether you're hosting a daytime meeting, evening celebration (birthday, engagement or graduation party), pre-concert gathering, sports screening, or live music night. Enhance the experience with a buffet or drinks reception. The upstairs room also features a private entrance, adding an exclusive touch. Whatever the occasion, O'Neill's St Mary Street has you covered.

*Please note this is not an accessible space, step access*


Event offers and packages

Package per person

SILVER BUFFET MENU - £11.00 Per Person
GOLD BUFFET MENU - £14.95 Per Person
VEGGIE BUFFET MENU - £10.50 Per Person

+ Tea/ Coffee Add on Available
+ Drinks Party Package Available

-Vegetarian buffet option available. Please ask a member of our team for more information
-We have a selection of drinks packages available to compliment your buffet, please see PDF's for more details

Meeting Offers

Arrival Hot Roll + Buffet + Tea or coffee
£22.35 per person
This meeting room package includes:
-An arrival sausage or bacon roll
-A buffet during the break (Gold Buffet)
-And a tea/coffee per person
Arrival Hot Roll + Buffet + UNLIMITED Tea and coffee
£30.20 per person
This meeting room package includes:
-An arrival sausage or bacon roll
-A buffet during the break (Gold Buffet)
-And UNLIMITED tea/coffee per person

Prices

Monday
9:00 – 23:00
from £400–£600 min. spend
Per session
9:00 – 17:00
from £400 min. spend
Per session
17:00 – 23:00
from £600 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Tuesday
9:00 – 23:00
from £400–£600 min. spend
Per session
9:00 – 17:00
from £400 min. spend
Per session
17:00 – 23:00
from £600 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Wednesday
9:00 – 0:00
from £400–£600 min. spend
Per session
9:00 – 17:00
from £400 min. spend
Per session
17:00 – 0:00
from £600 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Thursday
9:00 – 0:00
from £400–£600 min. spend
Per session
9:00 – 17:00
from £400 min. spend
Per session
17:00 – 0:00
from £600 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Friday
9:00 – 1:00
from £500–£800 min. spend
Per session
9:00 – 17:00
from £500 min. spend
Per session
17:00 – 1:00
from £800 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Saturday
9:00 – 1:00
from £500–£800 min. spend
Per session
9:00 – 17:00
from £500 min. spend
Per session
17:00 – 1:00
from £800 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Sunday
9:00 – 23:00
from £400–£600 min. spend
Per session
9:00 – 17:00
from £400 min. spend
Per session
17:00 – 23:00
from £600 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Pricing updated by venue 6 months ago

Capacity

Standing
up to 300
Dining
up to 80
Theatre
up to 60
Cabaret
up to 60
Classroom
up to 50

Catering and drinks

In-house catering available
Extensive vegan menu
Extensive vegetarian menu
British cuisine
No external catering allowed
Venue provides alcohol
Alcohol licence until 2:00 (extension available)
No BYO alcohol allowed

Facilities

Wi-Fi available
Projector
Flatscreen TV
Whiteboard
Flipchart
PA system / speakers
Quiet space
Unavailable: Paid parking facilities available nearby
Unavailable: Conference call facilities
Unavailable: Air conditioner
Unavailable: Photo equipment
Unavailable: Natural light
Unavailable: Video equipment
Unavailable: Lighting equipment
Unavailable: Greenscreen
Unavailable: Backdrops
Unavailable: Storage space
Unavailable: Dance floor
Unavailable: Soundproof
Unavailable: Mirrors
Unavailable: Accommodation is available on-site

Music & sound equipment

Play your own music
Bring your own DJ
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

Promoted and ticketed events
Temporary event notices available
No wedding licence

Age policy

Guests under 18 are not allowed after 17:00

Host rules

-No smoking inside the building
-BYO bottle alcohol not allowed
-Unfortunately, the venue does not accept funerals or wakes
-Any damage to, or theft of, property at the Host Venue (including, but not limited to, music equipment, furniture, fixtures and fittings, and any other property of the Host Venue) caused during the event times on the event date is your responsibility and will be charged to you at full replacement cost
-No 18th Birthday Parties

Cancellation policy: Standard 30 day

Show cancellation details

O'Neill's St Mary Street Cardiff is a Tagvenue Partner. This business has registered with Tagvenue and agreed to our venue partner standards.


Location

Location map

Meet your host

Prabs Ragbotra
Member of Tagvenue since February 2025
1h Response time
96% Response rate

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