Well, I don’t know of anything in Central MA, but Boston College does have a course in tinwhistle:
http://www.bc.edu/centers/irish/studies/courses/
MU 087 TIN WHISTLE: BEGINNER TO INTERMEDIATE
MU 087 in the fall semester is the prerequisite for MU 087 in the spring. Learn to play the tin whistle. No prior experience required. Learn to read and play the airs and dance music of Ireland. Classes are taught at beginners and intermediate levels by Jimmy Noonan, a well-known, respected Irish tin whistle and flute player and teacher. Generation D type tin whistles are available for purchase locally at a nominal cost. A small tape recorder is required. Tues 6:30-8, Jimmy Noonan.
Then there’s this, which might be the same thing:
http://www.cceboston.org/p9index.html
A little closer to home, there are classes at the Blackstone River Theater in Cumberland, RI:
http://www.riverfolk.org/programs.html
6-Week Irish Tin Whistle for Advanced Beginners
For adults and children ages 12 and older, with instructor Aubrey Atwater. Classes take place Tuesdays in February-March beginning Feb. 1, from 6:30-7:30 PM. Class is limited to 12 students; minimum 5 needed to hold class. Fee: $80.00. Prepayment necessary. Must have basic whistle skills or have completed the beginner level class. Emphasis placed on playing by ear. A hand-held recorder is recommended. Aubrey will present this advanced beginner class on the Irish tin whistle, also known as the Penny Whistle. Using a tune by tune approach, she will teach simple dance tunes, melodies, and airs and give tips on ornamentation and expression. Aubrey will also teach participants some of her own style of playing the whistle with the hauntingly long notes and expressive vibrato that she plays in slow airs and accompaniment to lonesome ballads.
(I’ve heard Aubrey Atwater play dulcimer at the Green Rooster and it was awesome! You might give them a call and find out when the beginner level class will be offered, or if they give private lessons. Hmmm…I see there’s a class in beginner clawhammer banjo…)
And there’s this place, which might be a little far (Canton):
http://www.irishculture.org/about.html
I’ve started going down to play once a month with the Dulcimer Folk Association of Ct, in Avon. It’s a haul, but it’s really fun! Mostly dulcimers, but I whip out the whistle if the song is too fast for me to play comfortably on the dulcimer.
Have fun!
Robin