This is a great place for a bachelorette party, or to just have a fun and out-of-the-norm night out. (Assuming you don't already sing every night...)
There is a main dining room where you can watch other people sing, or jump in yourself. What's nice is that, unlike Mr. Biggs on 10th ave, this place actually has a lot of people who are bad singers, so you won't feel bad!
The food - classic sushi, sake, etc - is great, too, so you can get drunk and sing even better. ;-)
I went here recently for a bachelorette party - though the private room was shaped in a strange way, it was a fantastic experience - wait staff was very attentive, food was great, we picked whatever songs we wanted and belted them out - great for a laugh anytime.