Is this going to be programmers/engineers only? I hang out on HN because I'm interested in general tech news and like the entrepreneurial spirit of the site, and would enjoy meeting like-minded people. But I'm not a programmer myself, and if this is a meetup intended more for people who want to discuss whether Rails should ship with ActiveRecord::Base.attr_accessible(nil), enabled, I'm afraid I'm going to be rather far out of my depth.
I'm not a professional programmer either, so that makes us two already. For what it's worth, I think you should just come, and it will be what you make it to be (you know what I mean?).