Lame. Lame as heck.
The premise seemed kind of fun, but when I got there it did not take long for Sing Sing to disappoint. The $7 cover was way too high for this place, and the drinks were not good. The music the guys played was all stuff from like 1987. Nothing modern, mostly stuff you would hear on Bob FM during the two o'clock hour at work. The medley from Grease was a crowd pleaser I guess.
Part of their schtick is that if a member of your party is having a birthday or wedding or what have you then you can pay to have that person dragged on stage and they will sing a song to them. They were doing dirty versions of well known songs, and there was really only one joke. "Hey there Delilah" became "Hey There V****a" and that was the cleverest one. Hope you like 7th grade dirty jokes, because you'll be hearing a lot of them. Mostly ones that you already know from 7th grade.
I would not recommend anybody go. I want my brain cells back.