Pacific Coast Harmony will present “Summer Soirée, a concert of modern four-part harmony music, which spans the Great American Songbook, Broadway theater and film, popular traditional pieces, and beyond. In addition to the chorus, there will be several special quartet appearances. The concert will follow a reception from 2:30 p.m. to 3:15 p.m. with beer, wine and hors d’oeuvres and a silent auction.