Sorry, but there's actually a tight hold on the keys here, and sure, maybe it's happened, but hey, it doesn't happen. No evidence, no nothing, no one talks about it, no one says that it has ever happened, no joking about it, and everyone sits on the couch, because they know that the green room is a place where you don't do stupid crap like that, because everyone knows that people work there every day, and it's rather disrespectful. All in all, it's a very professional place. The whole place goes under lock and key at one in the morning, anyway, so you can't get in. And all of the people who work in the tech department who have keys are or were in the CHOICE (substance free) housing, and are rather conservative on the issue that we are discussing here, so there is really no issue about it happening there. And the actors and other folks who aren't that conservative about this know that it's just a bad idea.
In short: sure, it might have happened under a looser theater department, but it won't happen now, and I'm happy for that. Some people may dismiss the whole idea of a theater department being able to be understanding that the whole theater is the department's space, the department being the professors, assistants, students, janitors, everyone's, and you just don't do that sort of thing.
EDIT: and about the couch. I didn't have it thrown out, I was glad to just toss some
muslin over it. It was really thrown out when the new principal got wind of what might have gone on, and had it removed. That resulted in the biggest territorial pissing match between the janitorial department and the theater department ever.