There’re Meetups for all kinds of things, but I’ve been mostly to Slashdot Meetups. I went to one Linux Meetup back in January (to California Pizza Kitchen) but there hasn’t been one since then (they’re automatically cancelled if less than five people sign up).
However, there’s another Linux Meetup tomorrow (Tuesday), at the Cafe Brazil on Elm Street. I'm not sure what I'll order, though I often order a make-your-own omelette with sun-dried tomatoes, feta cheese, and chorizo sausage. Hmm, yeah, that could be good.