Kristen Stewart, Julianne Moore, Lara Stone, Baptiste Giabiconi and Lily-Rose Depp at the Chanel roulette table. Photo: Pascal Le Segretain/Getty Images Guests never quite know what to expect when they walk into a Chanel fashion show, especially since Karl Lagerfeld has created a feminist rally, a life-size faux supermarket, a fully-functional brasserie and a sprawling art…