Attending my goddaughter Cara Delevingne’s 26th birthday party at the trendy Chateau Marmont hotel in LA, I was interested to see how today’s young dress to party. Forget the fairy frocks, cocktail dresses and lounge suits I remember from my Hollywood parties in the golden age; it was shorts, ragged jeans and T-shirts emblazoned with cryptic messages for the boys, and minute, fabric-saving, low-cut dresses for the gals.