Thinking about starting one in my area focused on React. My goals: to learn more about React, to network with like-minded people, to grow socially and professionally. I've never done this before and am curious to learn from the community's experience before creating the first meeting.
Thanks.
I can say that I very, very much enjoy hosting the meetup. I've even met a few people in that context who I became friends with and/or later hired when I had the chance.
I would do it again in a heartbeat, and answering your "Ask HN" post I think has given me reason to figure out how I can start consistently hosting it again.