Maybe Happy Ending, a touring music and performing-arts production, visits the Hippodrome Theatre in Baltimore for a stop on its national run. The show unfolds in a historic downtown venue that seats about 2,300 and is renowned as Baltimore’s longstanding vaudeville and movie palace, now refurbished as a modern performing arts center. The engagement underscores the Hippodrome’s ongoing role as a premier host for contemporary touring productions in the city.