Italian retailer Miss Sixty is attracting L.A. clotheshorses to its first West Coast store, a 3,000-square-foot space in Costa Mesa's upscale South Coast Plaza. Created by Borruso & Alessandro Design of Venice, Calif., the futuristic shop includes pod-like, shadowbox “camerinis” (Italian for dressing rooms.) The trendy chain plans to open seven to 10 U.S. stores by 2004, including one location in Washington, D.C.