I joined 20 years ago out of curiousity if I could pass. I did and paid for a membership for a year because why not, but i never did anything with it and never renewed it.
The one thing I might have liked is the local meetings. Our local chapter had a website where they talked about the meetings. They were informal, just dinner and chatting in a private room at a restaurant, and you could learn a little about the people from the website too. It seemed to be heavy on scientists and engineers. This is near a national labratory so that made sense. I would have liked to have more friends like that, still would. But, for all I know, mensa scientists and engineers might be the worst scientists and engineers. They also appeared to be mostly over 60 and I was 20 at the time.
There are discounts on certain things according to their website https://www.us.mensa.org/shop/benefits-and-services/
I wouldn’t know. I just passed the mensa test because I’ve always been good with tests, but I don’t think I’m smarter than anybody in terms of brain horsepower.
However, I’m curious about how things work and retain information like crazy. I’ve come to realize not everybody does that. Some people think I’m really smart but it’s more like I have experience or interest that they don’t have in the thing they think I’m smart at.