Good God I wouldn't go there if I was the most desperate man on earth. The smell would be toxic and the girls would resemble a short bus.
Speaking of girls, that's probably the only rave I can think of where men would outnumber girls by like 10-1. Have fun rolling with a bunch of sweaty skinnyfat bros.
EDIT: Any hot chick there will already have a non-special fellow boyfriend, either attending with them or at home. No hot chick is going to one of those to roll and get fucked. At best you're getting an ugly broad that spreads to whoever is willing.
I just got back from anime rave and well this isn't exactly true. Sure, there were tons of ugly chicks and chicks with their bfs. But, there were tons of decent to hot girls.
And on the dude side. Yeah, probably more dudes, but I hate to say it, many wouldn't feel embarrassed at all on taking off their shirt.
Anime fans sure like to party.