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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]()
Rockpools 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.”from £33
per person / per session -
![Upper Level at Be At One Cardiff in Cardiff Centre]()
Upper 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 afrom £250
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![Bar Two at Revolution Cardiff in Cardiff Centre]()
Bar Two
80 guestsRevolution CardiffCardiff CentreDDamian M.
“Great size room, helpful sales manager, good selection of food and decent quality”from £1000
minimum spend / per afternoon -
![Private Second Floor at DNC BAR in Cardiff Centre]()
Private Second Floor
120 guestsDNC BARCardiff CentreOur second-floor function room is available for hire with its own entrance, bar, bathroom, sound system, and all the necessary comforts for any event. The capacity is 60 guest dining and 120 standing.from £70
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![The Front Bar at Dirty Martini Cardiff in Cardiff Centre]()
The Front Bar
50 guestsDirty Martini CardiffCardiff CentreThe front bar is a beautiful private space located at the front of the venue with floor to ceiling windows allowing plenty of natural light into the room.from £500
minimum spend / per day -
![Whole Venue at The Athenian Tree in Cardiff Outskirts]()
Whole 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.from £25
per person / per session -
![Full Venue Hire at Tonight Josephine Cardiff in Cardiff Centre]()
Full 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 hangoutfrom £1500
minimum spend / per session -
![Rhythm Room at Walkabout Cardiff in Cardiff Centre]()
Rhythm Room
150 guestsWalkabout CardiffCardiff CentreEnjoy 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.from £250
minimum spend / per session -
![Second Floor Bar at The Botanist Cardiff Central in Cardiff Centre]()
Second Floor Bar
90 guestsThe Botanist Cardiff CentralCardiff Centre
#Supervenue
Located on the top floor next to our beautiful Terrace. Full of hanging baskets and a long spacious room for all large celebrations and work parties. Perfect for the following: - Summer Corporate Parties With Bar hire, youfrom £55
per person / per session -
![VIP Area at Dirty Martini Cardiff in Cardiff Centre]()
VIP Area
100 guestsDirty Martini CardiffCardiff CentreFor parties of up to 300 guests, the VIP Area can be hired exclusively. This includes plenty of luxurious seating areas and a private bar.from £500
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![Full Venue Hire at Walkabout Cardiff in Cardiff Centre]()
Full Venue Hire
1400 guestsWalkabout CardiffCardiff CentreAt Walkabout Cardiff we believe in bringing that relaxed feel of Australia to a bar near you. This is the place for people to come together, have fun and chill out whilst enjoying tasty dishes inspired by Aussie street food,from £2000
minimum spend / per session -
![The Marvellous Medicine at Flight Club Cardiff in Cardiff Centre]()
The Marvellous Medicine
120 guestsFlight Club CardiffCardiff CentreFlight Club, the home of Social Darts, are launching their first Welsh venue in the beautiful city of Cardiff. Social Darts, Flight Club's revolutionised version of the traditional game, features fast-paced, multi-playerfrom £4320
minimum spend / per session
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FAQs about Top 21st Birthday Venues in Cardiff
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.
