When I was in high school I worked at a restaurant. We closed at ten and cleanup plus preparing for the next day took until about eleven thirty. After that we went bowling until about two, followed by eating at Howard Johnsons until the drunks had gone home. Went home, got to bed about three thirty, and up for school at seven. Rinse. Repeat.
Never any problem.
I worked the same shift when I was a kid. However, one night we had a shooting just outside of the restaurant.