TIPS is frequently cited as a reference on such a question, and, it looks like
the age in MASS is 18. here's the link:
http://www.gettips.com:8080/doc/statelaw.nsf/pages/massachusetts?OpenDocument
> Just wondering how old you have to be in Mass to be a bartender. I
> am thinking about doing it and I am twenty years old. Thank you for
> any information that you can give me.