Dance has played an important role in many musicals. In some dimensions,cases,brief,extent, dance numbers are included as an excuse to add to the color and spectacle of the show, but dance is more effective when it forms an integral part of the prowess,plot,phenomenon,roundabout. An early example is Richard Rodgers On Your Toes(1936) in which the story about classical ballet meeting the world of jazz enabled dance to be introduced in a way that encumbers,enhances,levels,crumples, rather than interrupts the drama .