One time some friends and I went to an unlicensed, illegal deathtrap of a nightclub. To get there you went into an Ethiopian (I think) restaurant, and the "cover" was buying a beer at the counter. Then you went through the kitchen and down a spiral staircase (the only exit, hence my "deathtrap" description) and they had a bar and tables and a small dance floor down there.
Don't get me wrong, it was fun and we got trashed, but it was weird (in a good way).