Now, I can't quite figure out if the Booty Olympics show is at Arlene's Grocery tonight or if it's tomorrow. But if you're in NY then you can check the finer detail. Ms Delran says "we just finished our new record and practiced a bunch so we'd be ready to play for you tomorrow night at 9:00. We'll be doing mostly new stuff! YAY!". Sounds like a tidy wee night out to me.
Update - It's tonight, the 21st. I went to the site and found out so you wouldn't procrastinate.