At the Roundabout, the Remarkable 'On the Exhale' and Awkward 'Orion'
One of five showcases in New York devoted to "new and experimental works" produced by the Roundabout Theatre Company in its "underground" program, the tiny Black Box Theatre, Sixth Avenue and 46th Street, is currently hosting Martin Zimmerman's On the Exhale, a remarkable one-hour, one-woman monologue by the enchanting actress Marin Ireland inspired by the heinous school shooting at the Sandy Hook Elementary School i…