But none of that explains or justifies the show’s existence. Nor, despite enormous effort, can the book by Bob Martin. In building a case for a vintage piece of intellectual property — Betty was born as a half-dog in 1930 — Martin winds up replicating the kind of musical he roasted in ‘The Drowsy Chaperone’... That show’s imaginary ‘Eleanor! The Eleanor Roosevelt Musical,’ is no less ludicrous than the real-life ‘Boop! The Musical.’