Never one to let sartorial injustice go uncorrected, Ms. Wintour instituted a radical change in the dress code for an event celebrating both the inauguration of a rebranded Anna Wintour Costume Center and an exhibition on the great designer Charles James. She stipulated full evening dress and decorations for the men. That, for the benefit of those who grew up under the dark cloud of Casual Friday, means a black tailcoat, a waistcoat, a wing-collared shirt and white bow tie. Let’s not forget the sheer silk socks, patent leather evening pumps, medals and rosettes.

True, the closest most American guys are likely to have come to this archaic get-up is playing Monopoly. That is probably just as well, since it turns out the new sartorial ideal for Costume Institute dandies comes fairly close to that of the game board’s icon, Uncle Milburn Pennybags.