In a partnership for the ages, two Broadway legends—Bernstein and Sondheim—took Shakespeare’s Romeo and Juliet from Verona in the 1500s to New York’s Upper West Side in the 1950s, replacing the Montagues and the Capulets with American and Puerto Rican street gangs. Their unforgettable work, with tunes universally loved, comes alive in a dynamic concert version, the first time an orchestra has performed the complete musical in a concert performance.