I lived in SF for a few years and often frequented the Exchange. There is no place like it in the world. They have certain nights with certain themes. I have seen the craziest shit in the world at this place. Just pure domination, beatings, bukkakkee's , fisting, funneling, gang bangs, but the most disturbing scene I have ever witnessed was on a Wednesday evening , it was called "Water Sports" and more , it was a $100 cover that night, this was years ago when the normal cover was $20. More than 13 years ago. I walked in and there were 20 girls suspended in the air on swings , loud music going on, people doing lines off of each others bodies, guys releasing on girls in the dungeon, just pure craziness.. there was a huge tarp underneath and at 1:00am about 40 girls and guys started getting naked and rolling around on the tarp, keep in mind there are the girls in the air swinging, then a countdown started to happen from 50, the music got louder and louder and everyone was counting down, the girls in the swings were moving faster kicking their legs and at 0, in a synchronized fashio, they all started to pee on the people down below and they were all rolling around in the pee kissing each other, it was gross and I couldn't believe it, then people started to chant " scat scat scat scat scat" and about 30 seconds later the girls started to scat on the same people, it was so gross I almost puked and had to leave, they were rolling around in scat etc etc... pure disgusting, but on the other days, it is a fun place and lots of action there.