I’d expect most Mensa members to be quite nerdy, socially inept and a little “off” in areas of their lives. Personally, I don’t know if I’ve met or known any Mensa members, which are the kind I’d like to know.
I was invited to join MENSA in 1976 after I got my Army ASVAB GT score of 148 (local recruiter said that was the second highest score he’d ever seen, first being my brother three years earlier, had a draft # of ONE right when the little dustup in VN was called off). So my first permanent duty station, Monterey chapter said to add ten points to get a rough IQ score. Sure. So I joined. Paid a few bucks’ worth of dues, went to a couple meetings. Mostly D&D and SFF discussions. The single most boring, arrogantly entitled, cluster “F” of effete snobs and geeks I would never want to be associated with again in this lifetime. But it looked good on my college and med school applications and CV for future jobs; Phi Beta Kappa got more notice.