I've only ever been here on Wednesday night for karaoke, so I can only speak for Wednesday nights. I enjoy it myself; it's not horribly crowded and I'm a karaoke nut, so there you go. They also have beer pong.
What I do enjoy about this place come Wednesday is for a mere $20 you can have all you can drink draughts, which is awesome. Karaoke goes from 7 - 11 (or later) and it's good. Service is always very good here.
All in all, I'd say check it out. It's a nice pub, great beer, and all you can drink on Wednesday.
EDIT - I have recently discovered Quinn's DOES in fact offer food. It's traditional Irish fare, and can't say I've tried much of it. The shepherd's pie is very good though.