First collaborating 20 years ago in Fool Moon—a show that made three separate stops on Broadway in the 1990s—veteran stage clowns Bill Irwin and David Shiner reunite with Old Hats, a nouveau-Vaudevillian collection of comedic sketches and musical numbers. Joined by London-born musician and performer Nellie McKay as well as a four-person band, the pair employ the traditional (baggy pants, oversized shoes) and the modern (iPods, iPads and digital projections) for routines involving escape from giant boulders, the world of business and the modern political landscape.