Yep, one of my esteemed parents joined Mensa, long ago, and went to some get-togethers in Manhattan, where you could meet the cream of the crop. People like Asimov, people celebrated for brains. Verdict: “They stuck to the same subjects as anyone else: food, work, and sex, in that order.”
Me, I hang out with my neighbors, they are mostly elderly folk who need rides or other such assistance. They are not, as far as I can tell, Mensa material, but I learn from them all the time and they are never boring.