The Fellini of Fashion, Alexandre de Betak and his wife, the Most Stylish Woman in NYC Sofía Sanchez Barrenechea de Betak, guide us through their pied-a-terre, which the couple describes as playful, fun, versatile, and European-ish. The apartment features Japanese architecture, an in-wall cold sake machine, a secret passage through a bookshelf leading into a karaoke / pole dancing room.