My cat always chose the strangest places to sleep---upside down on the top of the couch, in the bathroom sink, under the couch cover---you never knew quite where you'd find her.
I had a friend in college who had the enviable ability to sleep just about anywhere---on the grass next to the busy commons, in the corner of a dining hall, on the roof of the residence hall---he was able to crash just about anywhere and catch up on a few hours of sleep he missed while studying for exams. It's a useful skill to have. Personally, I could crash in the music rooms (little individual rooms with a piano inside). I would just push a bench up against the door and catch a few hours of sleep between classes. Since I was shuffling between multiple campuses, this was a useful way to pass a few hours.