David Mamet's 1976 classic profiles one day in a claustrophobic junk shop in Chicago and three men who talk, worry, and fight over a robbery they're planning for that evening. The performers are fevered and desperate, particularly Mark Fullerton as a ne'er-do-well, who flaps and sputters around the stage like a spastic, pissed-off scarecrow. We already know how it ends—with one of the triumvirate bleeding, one smashing up the shop, and the third watching helplessly—but the conclusion is still alarming. (Theater Schmeater, 1500 Summit Ave, 800-838-3006. 8 pm, $15/$18.)