One of “the world’s oldest living promising young playwrights,” Bing Ringling’s 844th script is finally about to be produced, bringing Bing dreams of being, well, rich and famous. A surreal comedy with music, Rich and Famous is part vaudeville, part absurd, and an entirely funny romp through the perils of being a successful artist, by playwright John Guare, the genius who also wrote “The House of Blue Leaves” and “Six Degrees of Separation.”