Arriana invited 30 of their friends from around the world including the Duke and Duchess of Marlborough, Cornelia Guest wearing a navy blue cocktail dress with a sable collar by Bill Blass, Beatrice and Julio Mario Santo Domingo, Jane Churchill, Patty and Gustavo Cisneros, Lita and George Livanos, Sally and David Metcalf, Terry Allen Kramer and Nan Kempner (her again and again and again) in a blac