R/meetups

http://code.google.com/p/lesswrong/issues/detail?id=389&sort=-id%20-estimate&colspec=ID%20Estimate%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Contributions

Meetups now have their own, mostly invisible subreddit.  Needs an admin to add a private /r/meetups.  /r/meetups cannot be directly accessed - all interaction happens through the meetups controller.