https://polyevents.blogspot.com/?m=0
There was a question about how to meet poly folx, and my first thought was go where they are - as in what is the overlap between one’s interests and poly folx? This link is to a more specific subset of events where one can find like minded people. The question: Where have you found to be a good place to meet polyamorous people?
There are numerous groups in NYC that have like picnics, bar nights, and discussion groups. Those are typically pretty small scale, but you can certainly meet poly people there.