We usually penalize event announcements as not intellectually interesting but since this thread is turning into something more general, I took off the penalty.
How about scheduling a HN Meetup submission periodically like "Who's hiring", where everyone could announce there local meetups?
That would be really cool, I'm sure a lot of people (including myself) have never heard of an HN meetup or knew they existed. This thread is building community, and seems really cool. If there was one resource where all the meetups were consolidated, what better place to do that than HN itself. Something like the github list posted by anton_tarasenko[1] but in the menu bar would even suffice fairly well IMO.