Free stuff to do in Boston this weekend

The obvious choice this weekend is the annual EarthFest concert that will occur on Saturday, May 22nd at the Hatch Shell.  More than 125,000 people are expected to attend the concert hosted by Radio 92.9 FM.  Even the event is quite green with a free bike-valet program available to encourage people to leave their cars at home. The music line up this year includes Collective Soul, Gin Blossoms, Crash Kings, and Marcy Playground.

If the idea of spending quality time with 125,000+ people does not sound appealing, invite a friend or two to come over to your place (oh yeah, suggest they bring a 6-pack) and watch the Celtics play the Magic game, time: 8:30PM.