In the 45 years since Jim Jacobs and Warren Casey premiered their musical Grease in a trolley barn-turned-blues club in Chicago, the show has taken on a life unlike any other theatrical production in America, or even the world. There have been 11 different major productions of the show throughout the U.S. and U.K., including a record-breaking 3,388-performance run on Broadway, five runs on London's West End between 1979 and 2007 and three national tours; an internationally-acclaimed film