I've been a goon on Something Awful for nearly a decade, and still hang out there a lot. They're mostly atheists so it fits, heh.
I also hang out on the exjw subreddit on reddit.com now, and found some people in my area through it. The community now also has an IRC chat room on freenode at #r.exjw.
Mostly, though, I hang out in my support group chat channel that I started about 5 years ago. I have bipolar disorder and I started the chat room as a safe, no pressure place for people with mental health issues. We're in #psychiatrichelp on irc.synirc.net if you wanna come hang out in the funny farm.