Loose organization of game developers in Connecticut. Find them on Discord, Twitter, Facebook, and LinkedIn.
One of the largest game development organizations in the area. They regularly offer courses, have demo days, and put on events in NYC.
Meet up group centered around Unity in Boston, open to the public.
Ludum Dare is a regular, theme-based, accelerated game development event. This is a fantastic resources for inspirational, interesting games. Take a look at the overall and innovation winners (both Jam and not).