O'Neill's St. Mary Street Cardiff

14/09/2026

Monday means one thing… it’s QUIZ NIGHT! 🧠🍻

£50 bar tab up for grabs 💷🍺
Round up your cleverest mates, grab a drink and put your general knowledge to the test!

📍 O’Neill’s
🕗 starts 7pm (ish)
👥 Teams up to 6 welcome

See you there🫵🏼

13/09/2026

Looking for the perfect place to celebrate? 🎉
At O’Neill’s, the good vibes never stop! Whether you're planning a night out with friends or just want to enjoy an unforgettable atmosphere, we’ve got you covered!! 🤩

🍻 Great parties every weekend
📺 Live sports on big screens
🎤 Karaoke every Friday
✨ And so much more!

Come and visit us on the weekends and experience the best nights in Cardiff! 😁

📸 Photos by https://www.instagram.com/knot_photographs/

12/09/2026

So good, we had to do it twice 🥳☘️

We’re celebrating HALFWAY TO ST PATRICK’S DAY this Thursday! 🍀

🎸 Live Music
💸 Student & Industry Discounts
🎶 DJ ’til 1am
🍺 Good craic guaranteed

Grab your mates, raise a Guinness and share the craic 🍻☘️

12/09/2026

12/09/2026

09/09/2026

🎤🔥 KARAOKE NIGHT AT O’NEILLS! 🔥🎤
Whether you can actually sing or just strongly believe you can… tonight’s your night! 🎶🍻
We’re keeping the good times going until 1AM 🕐 — so grab your mates, pick your anthem and get ready to sing your heart out!
🎓 Student discounts available
👷 Industry discounts available
🎤 Karaoke + drinks + questionable vocal choices = a great night
And remember… be nice to the staff 😇 because there’s always a chance they might just sing a song too🕺🏼🎶
📍 O’Neills St Mary St
🎤 Karaoke Night
🕐 Open until 1AM
Tag your karaoke partner in crime 👇🎤

09/09/2026

Karaoke Every Wednesday 🎤🎤🎤🎤🎤

Now open until 1am 🔥🔥🔥🔥🔥🔥

Discounts available for Students & industry with Valid ID

Live Football also Shown

08/09/2026

📣📣 Calling all Christmas Coordinators 🎄🎄

Our Christmas bookings are open & filling up Quickly. We can cater for large or small groups, options for private hire also available.

For more information & our availability drop us an email to [email protected]