Sophie McIntosh’s Macbitches is proof positive that some of the most exhilarating theater in New York City is being staged in Off-Off-Broadway houses. McIntosh’s 85-minute piece dramatizes what happens when Hailey (Marie Dinolan), a freshman acting major, is unexpectedly cast in the plum role of Lady Macbeth, and Rachel (Caroline Orlando), the queen bee of a college theater department in Minnesota, is left with big bruises on her ego.