It's a dueling piano bar. They have piano players rotating through out the night playing songs by request. There are some songs they play that brings the staff to the stage to do a specific dance. It's a lot of fun, esp when there's a good crowd.
There's cover but I don't remember how much. I want to say $15. It's 21 and over. They don't serve food, just popcorn.
If you google them, you should be able to see some pictures.