Oh nice, that one is actually closer to me. I think it's here:
https://www.facebook.com/NEBonsai/
So there are two clubs that meet at NEBG, I think that may be the other one. I've heard Kaikou may be the better one and I know John Romano tends to attend and has a wealth of knowledge to share. There's some details here but I think it's a bit looser than this. I never seem to make it to any of these but would like to go more.
learn.nebonsai.com
If you PM me I can shoot you the email address of someone who can give you more info. This is the one meeting Oct 2:
"A reminder that we will be having our regular club meeting on October 2nd from 2:00 - 4:30. Saturday will be a good time to begin early fall work and start thinking about winter storage. I hope to see you all there. "
The Bonsai Study Group that meets there is the other that I'm aware of, and that's actually meeting Oct 3:
"Our October meeting is next Sunday, October 3rd from 1-4 p.m. at New England Bonsai Gardens. Once again, Jun Imabayashi, Bonsai Master at New England Bonsai Gardens, will be working with the club for the first 2 hours of our meeting. "
So two groups meeting at NEBG this week for you to choose from.