Hedwig and the Angry Inch composer Stephen Trask is at work on a new musical titled This Ain’t No Disco!, set during the heyday of Studio 54. According to the New York Post, a workshop helmed by Trip Cullman recently took place at the Atlantic Theater Company. The show, featuring a book by Rick Elice (who is also working on the Cher musical), follows a couple from Queens who enter the celebrity and drug-filled…