This is the parking lot where Steve and Brandon take the girls they meet at the nightclub before they steal his Corvette in the season one episode "Slumber Party."
Sylvan Park Children's Center, 15011 Delano St, Van Nuys CA.
Note: The address for the center is on Delano St, but the scene was shot by the entrance to the parking lot/park off Lemona Ave that is behind the center