Pepperland is Mark Morris’s tribute to the Beatles’ Sgt. Pepper’s Lonely Hearts Club Band, released 50 years ago. Live musicians, including horns and a theremin, perform Ethan Iverson’s arrangements of selected Sgt. Pepper songs, plus Iverson originals inspired by the blues, jazz, music hall and raga styles featured in the album. With costumes echoing London ’60s mod, the dancers capture the freedom and energy of the era.