There’s nothing funny about nervous laughter. The forced way it slogs through a room with the stop-and-start undulations of bad jazz brunch jazz. The black folks and the round table of Latinas out for a night on the town knew when to stop laughing. The couple didn’t. The rest of us silently sipped our canned beer and sodas, determined to stay out of the fray. They were laughing solo because this had to be part of the show, right?