soft-seater
n.— «The Creekside Theater is in Winfield proper, and it’s what’s called a soft seater—picture a theater where you might watch a play or a musical…we’re on a curtained stage, there are rows of movie theater style seats, and a few rows in the front of plastic chairs for extra bodies.» —“Creekside Theater, Lake Country, BC” in B.C. Marc’s Road Diary (Can.) Aug. 27, 2004. (source: Double-Tongued Dictionary)