I'm practically a nap aficionado.

In college, I would go to the quiet study hall and sleep on the couch between classes. Because of this, I didn't know anyone at my schools name until my third year when I started finally having the same people in my classes. Plus I DGAF.
Later, when I started a part time job that would only let me work 5 hour shifts, starting at noon, I'd drop my wife off at work at 8am, then drive straight to work. If they weren't busy, they wouldn't let me start, so I'd go sleep in the car. This was in February of 2011 when there was two weeks of 10 degree weather. I slept in the car without running it for heat. Then I'd go work in a call center for people stranded on the road and listen to them complaining because it was cold outside. I had little sympathy.
Now, I sleep in my car when I have several hours between appointments. Parking garages are best, but under a tree will do as well.