Westside Regional Center. Regional Center that serves people with developmental disabilities in the following cities: Bel Air, Beverly Hills, Calabasas, Culver City, El Segundo, Gardena, Hawthorne, Inglewood, Lawndale, Lennox, Los Angeles, Malibu, Marina Del Rey, Mar Vista, Pacific Palisades, Playa Del Rey, Santa Monica, Topanga Canyon, Venice, Westchester, and West Los Angeles.