O'Sullivan's Pub

Just at the corner of Temple Bar on Westmoreland Street you find O'Sullivans. It seems to be an normal traditional pub, but there is a life performance from Thursday to Sunday, a guy with guitar singing Irish drinking songs or anything else you wish for.
It's usually full of tourists, but you also have a good few regulars, like us, that just can't get enough of it.
They serve bar food until 8pm or 9pm on the weekends. Staff isn't the friendliest you've met, but some of them again are great.
The decoration is lovely. They have two huge old barrels you would be using as table (the do carry a grown up to dance on too, but the staff doesn't like the idea very much :))
You might want to avoid it on Friday and Saturday as the pub (just like most other pubs) would be full of hen parties. But check it out, some weekends it's a lovely crowd in there. And still the nicest days are Thursdays and Sundays.