How did you find your gaming group (that wasn't already your group of friends)?

I'm interested in the ways people found their gaming group. I own a lot of games and invite my friends over to play, but they aren't as into the hobby as I am. I'm trying to convert them, but we don't meet up very often and they're only in the mood for light, short games.

I've gone to some Meetups, but it feels awkward to ask if people have gaming groups outside of Meetup that I can join.