Before Beverly Hills, there was Hancock Park, an old, elegant area in Los Angeles that is the home of the mansion where Santa Barbara hosted its 1988, 1990 and 1991 holiday parties. This year, the culinary highlight was a pasta bar featuring three different kinds of tortellini. After diner, a deejay provided the sound as Santa Barbara stars rocked the dance floor. Conspicuous by their absences were A Martinez (Cruz), Eileen Davidson (Kelly) and Jack Wagner (Warren).