A couple of years ago, while at TMS for a NA$$CAR weekend, some people brought in a double-decked trailer and parked it near the turn 3 fence in the infield. It was a great viewing spot for the racing. Then after dark, they unveiled some spotlights, a video camera, a video projector, a sound system and a live DJ.
The trailer was equipped with stripper poles on both levels - and there was no shortage of "volunteers" - and LOTS of skin on display!
I have some grainy out-of-focus pics stashed somewhere...