Just down the road, Tanglewood is the summer home of the Boston Symphony Orchestra and is a beautiful place to see some music. You can buy tickets for the Shed, or just get tickets for the lawn and take a picnic. They release their schedules and tickets around January.
Steps from the venue is this theatre company that does more than just Shakespeare. A great place to watch a show!
If you want to see an amazing dance performance, this is the place for you. We recently saw a ballet Bowie tribute here. They do great stuff.