HRI, Food for Free, the Boston Area Gleaners, Whole Foods Markets and many more are hosting eight weeks of farmers’ markets where all the food is 100% free. Tuesdays at Riverside Press Park, Cambridge 6pm - 7:30pm July 11 - August 28 Thursdays at Trolley Square Park, 2401 Massachusetts Avenue, Cambridge 6pm - 7:30pm July 12 - August 3