On a recent Tuesday evening, the line outside “Ain’t Too Proud,” the Broadway musical about the R&B supergroup the Temptations, snaked around the block. Many ticket holders fretted over whether they would be admitted before it started, but not Michael Kors.

He stood in line patiently with his husband, Lance Le Pere, playing I Spy a Celebrity. Jessica Lange was up ahead, making her way inside. A woman in a red coat stepped out of a car; Mr. Kors identified her as “Liza Minnelli’s best friend.”

“Her husband was like the disco dentist,” he said. “Everyone at Studio 54 went to him.”

Mr. Kors, 59, who built a multi-billion-dollar business off his beige off-the-shoulder sweaters, baby blue skirts and “Project Runway” witticisms, had on his usual outfit: a black trench coat, black sweater, vintage gold Ray-Ban sunglasses and a pair of Levi’s, which he wore with New Balance sneakers.