Here's the diary entry:

p. 749, Saturday, August 2, 1986 - Wilfredo had gotten tickets for Prince, and so cabbed over to Madison Square Garden ($3). We passed Debbie Harry and Stephen Sprouse who were there, and we sat down just as Prince jumped out naked, or almost, and it's the greatest concert I've ever seen there, just so much energy and excitement. I saw Ron Delsener and he invited us to the party for Prince at the Palladium. Prince left in a limo the second the show was over.

We went into the Mike Todd Room and it was just almost empty, tables set up, reserved, and there, in a white coat and pink bellbottoms, like a Puerto Rican at a prom, all by himself, was Prince. He was just great, that image of him being weird and always with the bodyguards and everything was just dispelled, and he came over to each and every person and shook their hand and said he was so happy they came, and he danced with each and every girl – all these weird girls in sixties dresses. Literally with every girl, and he wasn't even a good dancer. And he remembered names, like he said, « So glad you came, Wilfredo. » What manners! And Wilfredo was in heaven. We asked Prince if he would be our December cover and he said we'd have to talk to his manager and we said that we'd asked the manager and the manager said to ask him, and so they said they'd work it out. We were just shaking, it was so exciting. And Billy Idol was there and you know, seeing these two glamour boys, it's like the boys are the new Hollywood glamour girls, like Harlow and Marilyn. So wierd.