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 60
seats
Up to 70
standing
Venue offers catering
External catering not allowed

About this space

Our upstairs private room can host up to 70 guests (with a mixture of seated and standing), 30 for a meeting set up, or 60 for dining. Making it the perfect space for milestone birthdays, after-work drinks, networking events, Christmas parties, engagement celebrations, or meetings.

The versatile space features a private bar, toilets located nearby, and a raised section that can double as a stage and use of screens. You can play your own music via our speakers, Enhance your event with a buffet or one of our drinks party packages. Get in touch to discuss your requirements—we’d love to help!

Event offers and packages

Package per person

SILVER BUFFET £11.00PP - Sample subject to change

Drunken Mushrooms* (V) 130 Kcal,
Dressed Side Salad (VE) 194 Kcal,
Seasoned Fries (V) 267 Kcal,
Tortilla Chips & Dips (V) 246 Kcal,
Ham Salad Wrap 312 Kcal,
BBQ Glazed Prime Chicken Wings 152 Kcal,
Sausage Rolls & Ballymaloe Relish 240 Kcal,


GOLD BUFFET £14.50 PP - Sample subject to change

Drunken Mushrooms* (V) 130 Kcal,
Dressed Side Salad (VE) 194 Kcal,
Seasoned Fries (V) 267 Kcal,
Tortilla Chips & Dips (V) 246 Kcal,
Ham Salad Wrap 312 Kcal,
BBQ Glazed Prime Chicken Wings 152 Kcal,
Sausage Rolls & Ballymaloe Relish 240 Kcal,
Steak & Ale Pies* 86 Kcal,
BBQ Pulled Oumph! Tortillas (VE) 236 Kcal,
BBQ Pulled Chicken Slider 197 Kcal,
Southern-Fried Chicken Slider 183 Kcal,
Cheese Burger Spring Rolls 129 Kcal,
Kimcheese Bites (V) 102 Kcal,
Colcannon Poppers & Ballymaloe Relish (V) 73 Kcal,

*Contains Alcohol
-Priced and portioned per person
-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


LUNCH AND A DRINK DEAL FOR MEETING ROOM ENQUIRIES

PDFS Will be sent out to enquiries

Meeting Offers

Enjoy a relaxed, inviting atmosphere far from a stuffy meeting room—in a comfortable space above the pub. Perfect for team building, private meetings, or even a fun sit-down pub quiz. With access to a flip chart and screen, and flexible package options, your day will run smoothly and effortlessly!
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
11:00 – 23:00
from £200 min. spend
Per session
11:00 – 23:00
from £200 min. spend
Note: 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
Note: 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
Note: 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
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Friday
11:00 – 0:00
from £200–£500 min. spend
Per session
11:00 – 17:00
from £200 min. spend
Per session
17:00 – 0:00
from £500 min. spend
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Saturday
11:00 – 0:00
from £500 min. spend
Per session
11:00 – 17:00
from £500 min. spend
Per session
17:00 – 0:00
from £500 min. spend
Note: 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
Note: Alcohol licence until 2:00. Extension available. All prices include VAT.
Pricing updated by venue 6 months ago

Capacity

Standing
up to 70
Dining
up to 60
Theatre
up to 30
Boardroom
up to 30
U-Shaped
up to 30
Classroom
up to 30

Catering and drinks

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

Facilities

Wi-Fi available
Flatscreen TV
Flipchart
PA system / speakers
Conference call facilities
Air conditioner
Natural light
Quiet space
Paid parking facilities available nearby
Projector
Whiteboard
Storage space
Alcohol licence

Music & sound equipment

Play your own music
Bring your own DJ
No noise restrictions

Accessibility

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

Rules of the space

Allowed events

No promoted and ticketed events allowed
Temporary event notices 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

(4 reviews and ratings - )

Verified reviews come from Tagvenue users. All reviews are checked by our team to uphold our trust and safety standards.
KC
Katherine C.
Verified review
Event Space · 40 guests · August 2025
Everything
Nothing
5.0
DH
Daniel H.
Verified review
Pub · 30 guests · May 2025
Venue was great size, bar staff were brilliant
4.8
JH
John H.
Verified review
Excellent communication
5.0
KC
Katherine C.
Verified review
Excellent communication
5.0

About O'Neill's Trinity Street Cardiff

O'Neill's Trinity Street is an amazing place, just a stone’s throw from the hustle and bustle of Cardiff’s city centre. Whether you're looking for a space to book more casual drinks, a private room for a party, a meeting room or a corporate function we've got you covered.

Get in touch to discuss your requirements—we’d love to help!

Location

Location map

Meet your host

Kysha Hillaire
Member of Tagvenue since February 2025
4 Reviews
4.9 Rating
1h Response time
100% Response rate

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

UK > Cardiff > O'Neill's Trinity Street Cardiff > Private Upstairs Room

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