Photo: Pari Dukovic for New York Magazine One of the last premiere parties of the Broadway season felt a little on the nose. The Great Gatsby, a ballad-belting, pyrotechnic glow-up of F. Scott Fitzgerald’s American tragedy with two onstage cars and a budget approaching $25 million, celebrated its official opening on April 25, the night of the Tony-nominations deadline, with an after-party at Tavern on the Green. The theme was the Roaring ’20s — the louche decade of easy money that preceded the