Three Balanchine ballets are joined by one of Robbins’ masterworks. Square Dance finds Balanchine using classical steps to interpret the American folk-dance idiom of the title. Haieff Divertimento is a more rarely seen ballet, a chamber work in five parts that one critic, at its 1947 debut, hailed as “an out-and-out joy.” Donizetti Variations also exudes a buoyant spirit with its intricate steps and gentle moments of comedy. And Robbins’ enigmatic and hypnotic Afternoon of a Faun, depicting a pair of dancers at work in a studio, is considered among his greatest achievements despite its simplicity.