Been there 2 times, first in late-90's and again few years later. Any info I have is prob stale/useless. If it hasn't changed, back then it had 2 entrances, one for gay men & other for straight. A gay friend of mine told me about the gay side, which is pretty much what you would imagine. Guys fondling each other & hooking up in pup tents, etc.
The other side was hit or miss. It's basically an open area with small rooms along the edge as you walk along. Kinda like walking through Academy of Science. You generally see some BDSM going on, couples going at it, swingers or threesomes, etc. These are roped off to prevent random idiots from going in.
In the open area, at least back then, it's 95% guys and most of the "ladies" walking around were TS streetwalkers (see them around Larkin/Geary). Have to admit, some of the Thai ones looked great. In one spot, one white TS was sitting with 10 guys around in a circle and she/he was taking turns sucking each one off (imagine musician playing pan flute). One would finish and immediately get replaced by another guy. Not my thing but I stepped in to watch & got a quick rub on the pants to entice me. I politely brushed the hand away & said "no thank you honey" & got a jolted response "I'm not you're fucking honey", just before he gobbled up another cock.
If lucky, you might see some "curious" girls who wanted to see what the fuss is about. They might start having a bit of fun with each other, but often that would bring a swarm of guys around, like sperm around an egg, each just hoping to get pulled in or any snippet of the action. One friend of mine was driving home at 2am after bar run & saw 3 hot girls going in. He immediately went in, paid the fee (I think was $100) and said they were all hot and he got to witness amazing girl-on-girl action. I suspect that is a rarity, even more so these days due to changes in society.
