Hotel Casa Del Mar, once a beach club frequented by the likes of Douglas Fairbanks Sr. and Mary Pickford, languished as a diet center in the 1980's. But the owners of Santa Monica's famed Shutters on the Beach stepped in with a $ million restoration, and the 129-room Casa Del Mar is poised for another star turn. Climb the sweeping marble staircases to the gold-mosaicked lobby lounge, where a cavalcade of tanned L.A. types sip cocktails overlooking the ocean. Hotel Casa Del Mar, 1910 Ocean Way, Santa Monica; 800/898-6999 or 310/581-5533; doubles from $335.-Geraldine Fabrikant