A very long night at the opera by DAN ROTTENBERG
In the backstage bickering of singers and composer during the opening night of Bellini's <em>I Puritani,</em> Terrence McNally has the raw materials for an intriguing drama. Unfortunately, McNally's <em>Golden Age </em>consists of more than three interminable hours of operatic name-dropping and hackneyed expository dialogue.