‘Tis the season for svelte plays with shortened character names. First there was Shayan Lotfi’s What Became of Us, a two-hander about a pair of siblings, Q and Z. Then Marin Ireland presented Pre-Existing Condition, about a woman, identified simply as “A,” undergoing therapy after breaking up with a man who hit her. Now comes N/A, a play by Mario Correa about two congresswomen identified only by their first initials, but who are instantly recognizable as former House speaker Nancy Pelosi (Holland Taylor) and AOC (Ana Villafañe...