21st Birthday in Cardiff

Your teenage years are well and truly behind you and you're firmly in your twenties, better make sure you celebrate your 21st birthday in Cardiff properly. With a whole range of quirky pubs, raucous clubs and swish restaurants, Cardiff has loads of options when you're wondering where to book your 21st birthday. Read our suggestions on Cardiff 21st birthday venues and get ready to party in style.

Last edited by Scarlett Welch

Last updated on 28th May 2025



Tonight Josephine Cardiff

Found in the very heart of Cardiff, Tonight Josephine is one wicked spot for your birthday. Book into a bottomless brunch with the squad, shimmying over to the pretty in pink space for Harry Styles, Mamma Mia and Beyonce themes.

Slug and Lettuce Cardiff Central

Taking Bookings

🌸 Kids Under 12 Eat For £1 on Sunday's ❤️ and 2 other offers

With venues in both Cardiff Central and The Friary, Slug and Lettuce is promising great vibes to celebrate your birthday. Their quirky pink interiors filled with flowers and neon signs, and there's plenty of room for you to hit the dancefloor later on in the evening.

They serve their signature two-for-one cocktails every single day of the week. And for something a little earlier in the day, why not try out their two-hour bottomless brunch? This can even be enjoyed out on the terrace, complete with unlimited drinks and tasty plates aplenty.

Be At One Cardiff

Taking Bookings

🎵 Midweek Mixtape 🍹 £5 Margs & Playlists on Repeat 🎵 and 1 other offer

Be At One does one thing and it does it seriously; join the bar as they shake, stir and muddle a huge selection of cocktails. The chic spot is located in the city centre and is well versed in organising events. They also offer personalised cocktail making classes, perfect for celebrating your 21st birthday in Cardiff.

Boho Club

Taking Bookings

Planning your 21st birthday party blowout? Imagine sipping on delectable cocktails, dancing the night away to the beats of the hottest DJs, busting a move on salsa nights, enjoying beautiful burlesque dances, witnessing epic fire-breathing shows, and sharing laughs at hilarious comedy nights. You can do all that and more at Boho Club on St Mary's Street, the perfect venue for your special day.

The Piano Works Cardiff

Taking Bookings

Christmas Early Bird Offer! 2x Standard Drink Vouchers and 1 other offer

Turning 21? Make it a night to remember at The Piano Works Cardiff, where your birthday playlist is front and centre. With a vibe that blends live music, cocktails, dancing, and interactive entertainment, this venue is perfect for anyone who wants a celebration that's a little bit special.

You and your guests can request your favourite songs throughout the night, party to a live band, and enjoy everything from bottomless brunch to late-night DJ sets. For a 21st birthday that hits all the right notes, this is the place.