The characters are simple, the storytelling is derivative of better-known musicals ("West Side Story," "Jersey Boys") and the tone is excessively sentimental and solemn. But "A Bronx Tale," the new Broadway musical based upon actor-writer Chazz Palminteri's coming of age in an Italian-American neighborhood in the Bronx of the 1960s, is nevertheless an entertaining crowd-pleaser and a poignant piece of theater. If it works, it works.