The document discusses genre conventions for gangster films, westerns, and musicals. Gangster films were prohibited from portraying gangsters as folk heroes under the Hays Code and featured distinctive contemporary hoodlum costumes. Westerns typically involve an individual solving conflicts in a morality tale featuring good versus evil, use landscape as a character, and distinctive cowboy costumes. Musicals originally had no serious narrative but became more integrated, used ambitious choreographed song-and-dance numbers and high budget sets, and followed commercial formulas.