The Nezinscot Valley Music Boosters will host the Mango Groove Steel Drum Band Saturday, June 16, at a free community concert in Sumner. The family event will take place from 5:30 to 8:30 p.m. at the Hartford-Sumner Elementary School gazebo on the playground. In the event of rain, the concert will move into the gym. Bring bring blankets, lawn chairs and picnic lunches, if you like. The Music Boosters will also operate a concession stand.