Many long years ago, I attended junior and senior non-proms (no dancing at our very conservative HS!), which actually were much more fun than if there had been lots of loud music and dancing. No pressure to be with a date (important, since I'd had multiple grade skips, including senior year, and actually attended the senior event as a college freshman), and consisting mostly of talking with your friends, eating, and being dressed up. I do not think I would have enjoyed a traditional prom much.
Having worked in a high school for years, I am not convinced that quite as many NT adolescents enjoy a traditional prom as one might imagine. Like many traditional activities, some really enjoy it, some hate it, and many are essentially indifferent, but find sufficient enjoyment because they believe that they are supposed to do so.
