How about raiding Balboa Park in San Diego? When I lived there, they were having hard time getting the gays to stop having "long lunch hours" by the merry-go round.
Same is true of Griffith Park here in Los Angeles. Don't dare pull into a scenic pull off. It's so disgusting.
When did you live there? Were you homeless? Homeless in Balboa Park was a big problem. ;) There were raids in the 1990's but I haven't heard of anything lately be it problems or raids, actually not that I tune into that. The last "big story" I recall about "public" gay sex was solicitations / hookups in SDSU bathrooms. It happens/ed at UCSD also; I once knew a gay man who claimed to engage in such behavior. Anyway, with the story I recall, KGTV Channel 10's "hidden camera reporter" got in trouble for recording in the men's bathroom. She(?) maybe was even soliciting.
Funny, when I saw the story headline I clicked expected it to be a San Diego story. I guess all those Balboa Park raids... and considering Balboa Park is on par with NYC's Central Park in size... Carry on!