Blake Lively, left, and Ryan Reynolds attend The Metropolitan Museum of Art's Costume Institute benefit gala on Monday, May 2, 2022, in New York. Parties are back, and they've brought with them the potential for some dress code chaos. White tie, black tie, black tie creative/festive, semi-formal. Pre-pandemic guidelines for attire in an exhausted world more used to sweats and sneakers may take some extra re-entry energy. (Photo by Evan Agostini/Invision/AP, File)