Folsom Street Fair. Judging for the name, one would expect something completely different. If you have no idea what it is, ask Google Images (NSFW). I think I had never seen so many naked guys, not to mention bondage and whip demos, leather and latex, and all sorts of crazy stuff, in broad daylight, in a major city center.
The two women in the picture above were just hanging out there, acting like cats, playing with toys. I so wished I’d had brought a laser pointer