Rug Room Coffeehouse at Murray Unitarian Universalist Church, 505 North Main St., Attleboro, MA 02703 (.8 mile off Interstate 95 at exit 5; 12 miles north of Providence, 35 miles south of Boston)looking for performers for next season. Second Saturday of September; first Saturday October through June, except when pre-empted by church fair. E-mail me for address if you're interested in sending demo tape to Dan McDermott of Bristol, R.I., who does the booking.
Stone Soup Coffeehouse in Providence, and Rose Garden Coffeehouse in Mansfield, MA., have websites that should be easy to find. Circle of Friends Coffeehouse in Franklin, MA., probably does. Black and White theater in Middleboro, MA., used to book folk acts..
Lots of other folk clubs in region. When in doubt, call the local Unitarian Universalist Church. Most of them seem to sponsor coffee houses or folk nights.