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.
Dang. Upon thinking about it, I don’t think I’ve ever actually done this. Recently, I did rent Beau Is Afraid for 48 hours and watched it 2 nights in a row because it was such a mindf*ck