Perpetual e-Motion, a Maine-based duo playing a cross of traditional, jazz and world music, will be in concert from 6-8 p.m. Sunday, July 7, at Inman Perk Coffee on the downtown Gainesville square. The duo’s traditional tunes entail bluegrass, Celtic and string band, making it one of the top contra dance bands in the country regularly touring from coast to coast. Perpetual e-Motion’s music focuses more on traditional contra music in a Southern style versus the New England contra dance music.