Peterborough Folk Music Society and the Peterborough Players are co-sponsoring “A Night of A Cappella” featuring: the ConVal High School The Clef Hangers and MorinTunes, Manchester West Blue Knights Choir and Plymouth State University’s Mixed Emotions and Vocal Order. The choirs will meet at ConVal for an afternoon of collaborative work and present a concert featuring all five ensembles at the Peterborough Players. There’s a suggested donation of $5 to attend the event (no tickets needed).