The engaging Trash embellishes a common New York story of two roommates in conflict by adding an important twist, as well as a variety of theatrical tricks, including audience participation. The Deaf creators and lead performers, James Caverly and Andrew Morrill, hold out occasional lifelines to a hearing audience via projections, a talking jukebox, and a character who isn’t Deaf, but just as often they speak in American Sign Language (ASL). Lest anyone balk at that, a good deal of the ASL portions are no more challenging than interpreting gestures in a silent film.