The weekly Prospect Eats event seems to be a hit, starting its second year (I think). They had some bad luck last month when their first two scheduled evenings of 2013 had to be canceled due to late spring snow storms. The winning combination appears to be food trucks plus live music plus beer, mixing in lawn chairs, dogs, and kids. It's much easier for Prospect to pull this off, given that it takes place in a private park and no permitting is needed.
Popular Wendy Woo was playing on Memorial Day: