Off the Grid Social
This was an outlaw event that a friend and I threw. We had to get a generator (and a backup, even) and set up at a bridge underpass just outside of town. The area was part of a walking trail, but local kids had set up a skate park there (unofficially) and punk bands occasionally used it for events.
Given how quickly we put the event together, I think there was a surprisingly good turnout (~50 or so), a lot of fun and a great vibe.