LOS ANGELES Vintage couture reigns supreme at Decades Inc., a Melrose boutique of rare designer fashions and accessories from the sixties and seventies (think Halston, Saint Laurent, Rudi Gernreich, and lots of Pucci). Owner Cameron Silver, a former cabaret singer and an ardent collector of classic clothing, is almost as fascinating as his wares. Customers are a glamorous mix of designers, starlets, and local arbiters of taste. Keep your eyes peeled for Hermès Kelly bags - always sure to fly out of the store (8214 Melrose Ave.; 323-655-0223).