One of the "coolest" things to do when we were in junior high & high school was to have "lock ins" for class activities.
We had this recreation complex that had a huge bowling alley, a ton of racket ball courts, tennis courts, basketball courts, handball courts, volley ball courts, and exercise equipment and they would "lock" us in there from 10:00 at night until 8:00 the next morning.
Good times.
All the sports and bowling you could want for like 10 hours.