THE PARTY American Express partnered with Tory Burch to bring the designer’s spring collection to The Field Museum for a runway show, exclusively for Amex card-carrying members, of course. OVERHEARD While discussing her design inspirations with InStyle Fashion Director Hal Rubenstein, Burch admitted the two things she just won’t do are culottes and fake nails. And as someone who loves entertaining, she confessed her best-weapon hostess secret: “I think you hand guests a great drink as they walk in the door. Make them feel welcome!” Photos by Barry Brecheisen