Pretty fun place to hang out and do some "crowd karaoke". Piano players were quite talented, and were even good sports when they'd get requests for songs that wouldn't be a hit with the audience (I'm looking at you Taylor Swift fans). Drink service was fast and friendly at the bar, prices were decent, and hey, $3 something lemonade vodkas with the yelp check in!
I can see how it might not be enjoyable if there's not a big and active crowd, so maybe linger in the hallway and gauge the audience before you pay the $5 cover to get in.