JOCKEYING: Blue dress by T-BAG ($202). Available at Urban Chic, 1626 Wisconsin Avenue NW, 202-338-5398. Hat with pink & blue band by HORSE COUNTRY LTD. ($165). Visit www.horsecountrylife.com. Black Label white linen wrap dress, by RALPH LAUREN ($898). Ralph Lauren, the Collection at Chevy Chase, 1245 Wisconsin Avenue, Chevy Chase, Maryland, 202-965-0905. Blue hat with teal beads by HORSE COUNTRY LTD. ($115). Turquoise vintage earrings, stylist owned.