I never went to prom. Just skipped ahead to the party.
At our school, prom was a 30 minute thing. Pictures, maybe one dance, then everybody went out.
My senior year, the school invoked the infamous 2 hr rule. You had to check in when you got there and you had to stay for 2 hrs. Of course, my class protested and ultimately boycotted. The juniors were a bunch of brown nosers so they went. The rule was dropped the next year (they were clearly targeting outlet class...with very good reason).
So we just met at someone's house and had a huge party. The juniors were banned.