The Medford Public Library begins a summer series of concerts on its Cummings Terrace outdoor patio, presenting The Spring Hill Rounders, which bills itself as “a country-rock band in a bluegrass body.” Members are Medford resident Neil Helme, David Rizzuti and Danny Erker. Other concerts in the series will feature the Marc Berger Trio on Thursday, July 27, and Magnificent Danger on Thursday, August 24.