Not as literal "only one" as these other stories, but another story I read reminded me of these two stories from college.

Freshman year I roomed with one of the most outgoing people I've ever met. He's currently been traveling Southeast Asia for the last 3 years, but I digress. He was always throwing crazy parties. One night we got a bit reckless and ended up joining our party with one across the hall in a friends room. In retrospect we were asking for it since we were blasting music and in general carrying on. Anyway, we find out RAs are in the hallway busting people and coming into the rooms. I sit down on my old laptop and start playing QIII Arena. Never even got asked if I was drinking. Guess they saw this kid in a hoodie, glasses, and big headphones nerding out and thought I just happened to be there. I was in fact incredibly drunk. Once the immediate danger passed I snuck off to a friend's room down the hall who was staying in to get work done and talked to him for a few hours while things cooled off.

Another time, I went with some friends I knew from the next floor up to get some weed from a guy in another building. The guy was predictably shady, but to this day we're 99% sure there was something else in there, because I started tripping balls in their room (which wasn't hard because they had Christmas lights strung all over the ceiling year-round and the real light was never on). At the same time, another guy decides now is the right time to eat a fuckton of shrooms and remove his pants outside (it's winter). I end up in the bathroom trying not to puke, and pass out there for a good 4 hours. In the meantime, multiple cops were in the hallway a few feet from me, trying to figure out what to do with a guy on this many shrooms, with that many cuts all over his legs from rolling it down a hill outside. I have no clue why they didn't question why someone was in the bathroom that whole time (traditional bathroom, door closed light on etc).