For entertainment alone, The Big Bang would get 5 stars. But since it is virtually impossible to get in without a 15 to 45 minute line, find a place to sit let alone stand, I give it 3 stars.
There are two reasons to visit this bar:
#1 If you are from out-of-town and have never been to a dueling piano bar... or
#2 It's your 21st birthday.
The musicians they have are downright amazing on the piano, and are quite the comedians with the audience. They have pretty decent drink specials during the week, but rarely any specials on the weekend.
If you would like to check this place out, I would suggest you get there early (say nine-ish) and get a table. Once the place starts filling up, it can be packed and completely miserable... even if you are drunk and singing "Eveeeerry rose has it's thorn...jussst like eveeeery night has it's dawwwwn. Every cowboy sings a sad, sad song....eveeeery rose has its thoooorn."