Boy, that takes me back. That's where I had my first field trip as an epidemiologist, when I shot myself in both feet, nearly killing my career, and at the same time, discovering that tops don't get AIDS, only bottoms get AIDS, and all the fucked-up discussion about what's safe (remember the famous oral sex is dangerous) was because guys, that I actually BB fucked at St marks the night before, said they never ever bottomed when taking part in our questionnaires, thus fucking up the real aids transmission risks and help launch paranoias like "you can get it at the dentist". I learned the hard way that men would rather go to their grave than admit that they bottomed.
But that's too long of a story. The St. Mark's was amazing.