Sonia Rykiel has been designing insouciant knitwear since the '60s. Her menswear vibrates with colorful stripes. The women's boutiques tempt with sexy keyhole sweaters, ruffles, accessories dotted with colored rhinestones, and soft leather bags. Métro: St-Germain-des-Prés. Other locations: 175 bd. St-Germain, 6, PHONE: 01-49-54-60-60; Métro: St-Germain-des-Prés. 70 rue du Faubourg St-Honoré, 8, Louvre/Tuileries, PHONE: 01-42-65-20-81; Métro: Concorde.