Ask HN: What are your favorite NYC meetups for finding collaborators?

I've been working on a software project for a while and finally have it at a point where I think there's something worth showing to people to work on with. I've been trying to follow advice similar to this: https://news.ycombinator.com/item?id=8096810 to build something I can show to others ("Turn the concept into a project. Work on any bits and pieces of the project that you can. Go to meetups, bring your idea to a hackathon, and maybe do a Show HN when you've got something tangible.") - I don't think I'm ready for a Show HN, but I would like to go meet possible collaborators at local NYC meetups. Since we here in NYC are currently swimming in meetups / startup events, I was wondering which ones people would recommend. I found some old suggestions on HN, but they are mostly defunct now.

Thanks!