Try John Henry's Hammer in Worcester MA, also John Stone's Inn in Ashland, and any number of bars, pubs restaraunts from Framingham to Boston. I would search the threads for questions requesting where the best jam sessions in town are. I refreshed one for you, if you want more type Boston into the (thread) Filter and search back 180 or so days. You'll find others.

Make a few sessions. Meet the area folkies, have fun, ask their advice. It'll work; I promise you!