Philadelphia's oldest theater mounts an almost-always lovable season of drama, comedy, and musicals. In Short The production standards are high here, even if the aesthetics aren't the most adventuresome. The Walnut is best known (and loved by its more than 40,000 annual subscribers) for its lavish and popular musicals. The mainstage theater is comfortable, with good sight lines and acoustics. Things get a little edgier in the Walnut's Studio 3 theater, where you'll see new plays and reinterpretations of classics in an intimate black-box setting. With five shows on the mainstage, and five more in the studio each year, you're sure to find something to see.