There's nothing more timeless than the LBD. Sweet details—a brightly hued headband, pretty pearls—create an Audrey-esque look that's wonderful for the country club. Sleeveless black taffeta dress with a belted waist and satin hem, about $50, Isaac Mizrahi for Target. Headband, L. Erickson USA, 888-884-3653. Smoky glass pearl-and-quartz necklace, Turq Jewelry.