The Hatch Shell bandstand is the dominant feature of Boston's Esplanade Park, a beautiful stretch of lakes, bridges, playgrounds and footpaths that traverse the Charles River Basin.  There one can find a parade of joggers, cyclers and inline skaters by land, and sail boats, windsurfing and sculls plying the water by sea (or river).  Best known as the venue for the grand July 4 performance by the Boston Pops, the Hatch Shell is also the site of performances with far less pomp and pageantry: Friday Night Flicks, umpteen dance, pop, rock and jazz concerts, and other fair-weather events.  Boston's Esplanade and Hatch Shell offers visitors and residents alike an ideal setting for recreational activities or perhaps just a picnic along the Charles accompanied by some classical music