FYI: this thread is a year old and the OP hasn't been back to the board since 2 days after she started it, so no one is going to be able to tell her anything anymore. Deep in the midst of these many old pages, OP explained her reasons for wanting to get away from the old folks; essentially she had a bad experience with an old guy who swore at her and called her names when she confronted him after he moved her stuff that she'd left on a deck chair. Several posters agreed the guy was a dick, but several also pointed out the etiquette issues involved with saving deck chairs, which OP did not respond to. In another thread, quoted in this one after OP disappeared, OP announced she was quitting diving. I'm still enjoying the conversation, but just wanted to give folks a heads-up now that I've read through the whole thing.
My thoughts: the fact that OP's desire to avoid old people was triggered by a verbal altercation with one old person makes her even less sympathetic to me than if she just found old people boring in general because they didn't have the same cultural reference points. It's the difference between merely being excited to meet other travelers from your home state when you're far from home, and not wanting to talk to the locals at all because you got mugged there and now you view all "those" people with suspicion.
Anyway, this 35-year-old's presence would have been at best a consolation prize for the OP (at least I'm not--gah!--50!!!) But as someone who still thinks of herself as young, I like hanging out with the older folks. Last weekend I went out on a dive boat with a handful of other certified divers and a bunch of OW students, and I got to chatting with one of the students, a guy who had to be in his 70s. Turns out he started diving in 1964, but long story short, life got in the way and now he's getting back into it and everything's different. It was really fun to hear about the old days, before my parents were even in high school, and how the sport has evolved since before people knew better. I'm childless by choice; I get why not many people my age can devote much time or money to this or any hobby. But I'm looking forward to my first liveaboard vacation with a bunch of retirees and their crazy stories.