The Glimmerglass Festival kicks off its 2017 season on Friday with the quintessentially American “Porgy and Bess” at the festival’s mainstage. Organizers say Artistic and General Director Francesca Zambello selected the original, large-cast, full-orchestra version of George Gershwin’s 1935 opera about marginalized Americans living on Catfish Row, an imaginary tenement in a South Carolina ghetto. Get full details on this performance and the other shows at glimmerglass.org