Did you know that the musical Grease was set in Chicago? The movie version wasn't -- it's in California -- but hey, it makes a good segue to the fact that "Sing-Along Grease hits the Music Box Theatre starting this Friday. The film's songs are subtitled in case you forget the words (as if), and there's a goodie bag and costume contest before the show. Get your tickets now, because the weekend showings are sure to sell out.