Sign up for the Contact Improv Boston Listserve. It is managed by Yahoo Groups. You'll receive an email from them... Respond and you're on.
The list is announce-only; it posts a few messages each week about contact improvisation events in and around Boston. Messages will have [CIB] at the beginning of the subject line, so you'll know it's really from us! We also post notices about events at Earthdance in Plainfield, MA and for major events (generally annual jams) in neighboring Contact Improvisation communities such as Burlington, VT and Montreal, QC, Canada.