For older females, upper middle-class life, even when coated with a veneer of happiness, creature comforts, and respectability, is not always all it’s cracked up to be. Playwright Zarina Shea’s Let’s Call Her Patty focuses on this milieu via an Upper West Side woman, flanked by her daughter and niece. Margot Bordelon’s direction reflects first the comic, then the tragic aspects of such a life.