Great atmosphere. I went late on a Thursday night and found it a welcome change from the usual, congested ,loud pub. The place was lively but enjoyably so. Tables were accented with candles which was a nice touch to the antique architecture. It made me feel I could stay just that bit longer and maybe enjoy a second Bailey's coffee....
The location is also great. You can slip in there after dinner at one of the many nearby restaurants or hop off the subway and go straight there for a bevy.
I don't know how nuts it gets on the weekend but I certainly enjoyed my visit. The only downfall I would mention is the amount of stairs to the washroom. You may want to escort your friend who's had too many or suggest the use the classy "down the stairs on your bum" technique.