I have lived right behind O'connor's for 6 years now, and until recently had only been there a handful of times. They have added some great local bands like Paddy's Peg Leg, and Shaneiki ( I can't spell their name). Really enjoy being able to go in and spend 40 bucks and need to call a cab to get home. I was really let down by the cover charge on St. Patrick's day, I know that it was a special event and all, but we got there at 1pm and didn't have to pay a cover and our table spent quite a bit, but at 5pm when we wanted to add someone to our table, they had to pay a cover... kinda a bummer when their web site says "no cover, ever". But I will gave them 3 stars because the cover went to charity.
Overall, great place to meet up with some old friends and have a nice relaxing evening.