On ritzy Sloane Street, The Cadogan features light, floral decor, damask wallpaper, silk trimmings and afternoon tea served in the drawing room. Yet things weren't always so refined. Lillie Langtry, mistress of the future King Edward VII, would conduct her trysts here. But most notable was the arrest of Oscar Wilde here in 1895. The Cadogan, 75 Sloane Street, London SW1 (020-7235 7141; www.cadogan.com). Doubles start at £194, room only.