decades ago I visited a well known gliding club with a view to taking it up, and I was really put off by the attitude of the people there. They said that I would have to hang around all day, possibly helping with menial tasks, and if I was lucky and a good boy I might get a short flight at the end of the day. And that if I persevered with that, I'd eventually get in more flight time.
I didn't take them up on the offer.
Now that I'm into jabirus, I can make a booking at 11am and I know just when I'll fly. I've been up in gliders and I love it, but gliding back then certainly needed to change. I don't know if it's still like that. Motor gliders might be the answer.