Diane von Furstenberg had a peculiar request at the end of the Audi TDI Clean Diesel dinner she hosted at the Standard the other night. Standing outside the hotel, the designer spotted a tall, dark young man who had just finished eating. “So she points to this guy and goes, ‘You, you are escorting me home,’ ” a witness related with a laugh. “He asked her if she was serious, and she said yes. So he ended up safely walking her up a few blocks to her place.” Also at the dinner were Olivia Palermo and Valentino’s Carlos Souza.