en-US Stub.com Tickets http://www.stub.com/film-schedule/ RSS Schedule - Buy Film Riverhead tickets for sale at cheap Film ticket prices to events in 2026. Purchase discount tickets for Film Riverhead NY at Stub.com. Buy tickets for Mamma Mia! - Sing-Along on May 9, 2026 8:00 PM at Suffolk Theater in Riverhead, NY. http://www.stub.com/mamma-mia-sing-along-tickets/mamma-mia-sing-along-riverhead-5-9-2026-7870465/ 7870465