Personally, The Rocky Horror Picture Show.
I knew it was going to be quite the experience before I went for the first time‡ but it was so much fun I had to keep going back bringing friends each time.
It's still a fun tradition to do though we haven't done it since last year, we're probably going to try and go again in a few weeks.
‡ I had seen it many times before going to see it in theaters for the first time.
Previously, I had never ever seen a movie in theaters twice. If I had seen a movie once and wanted to watch it again, I could wait to buy it for myself. It just didn't ever make much sense to me as to why anyone would watch the same movie multiple times in like a one-month time span.
And then Everything Everywhere All At Once came out, and I saw it again the week after I saw it the first time, and then I understood. What a fantastic movie.
Raccacoonie