Hey, you're on the original ZipZap website. There's an AU as well - ask Veery about it!
Yeah its just someone attracted to bass, someone like Passo, playing a bass for a bunch of people, or you can play music from a PonPou or any audio source for the blob to listen to. It used to be an inappropriate place. Some of the bass cafes were converted into crazies bars, but this is a rare occurrence. For the crazies bar conversions, the private rooms with various bass-attracted blobs were removed.
Passo is known to work at one of these places. People go mainly to jam out with her instead of going in the name of lust. The other people go because they're sick freaks.