Prom Date Mixtape will groove through ’80s new wave songs from 6:30-8:30 p.m. on Aug. 22 at the city of Mercer Island’s Mostly Music in the Park series in Mercerdale Park. Presented by 4Culture, Mercer Island Community Fund, mioposto, Mercer Island City Lifestyle and Mercer Island Martial Arts. Photo courtesy of the city of Mercer Island’s event page