I’m curious. Most of my friends come from some clubs I’m in. Some are from my high school. One was in my orientation. A few from my floor last year. I haven’t made an effort to make friends in my classes - I probably should.
I think a mix of class and the Jewish community, and then that branched out into being introduced to friends of the friends I already made.
Clubs, my residence hall, work, class and through other friends.