You'd meet up for dinner at a local place that was usually pretty good, with 2-3 other people, mostly tech-adjacent. Dinners were pretty polite, a little awkward, mildly stimulating, but I never made real relationships from it. Seems like the same idea has emerged with https://timeleft.com.
I don't know. It seems like the best way to make friends is to force people to do some other task next to each other a few days per week and let things form organically after they are around each other for a few years.