Ann Arbor Summer Festival
will be on during the summer school. There are concerts/shows every night in downtown Ann Arbor. See this link for more info.
Restaurants
Check out this link for restaurant recommendations
Canoeing and Boating
Check out this link for boat/canoe rentals at Argo Pond.
Detroit
has some great restaurants, cool museums, and fun sports. The D2A2 is a bus service that connects Ann Arbor to Downtown Detroit.