SUBJECT LINE: Fifty Boston-area summer recreation sites

Cambridge bars cars from Memorial Drive from Western Ave. to the Longfellow Bridge near Harvard summer Sundays 11 a.m.-7 p.m. You can rent blades, pads, and a helmet at Blades, Board & Skate, 38 JFK St., Harvard Square, 617-491-4244; and bikes at Ata Cycle, 1773 Mass. Ave., 617-354-0907. 46. Hold onto your breeches ................
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