The second year I lived in the dorm, I started a job that had me working until 1:00 am or so on Saturday nights. One of my friends was a real night owl, so I'd call her when I got back to my room; we'd both grab our laundry and head for the laundry room.
The laundry room was away from the dorm rooms, and didn't have posted hours. We almost always had the place to ourselves, so we'd sit down there, play a board game or study, etc. We got our laundry done, I got some time to wind down after work, my friend liked being up late, so it worked out fine.