The Darkroom is the best lab in Los Angeles, except for maybe A & I in Hollywood. They still do all types of film processing and printing. The prices are fair, the service is good, and the turn-around is very fast. They carry a full line of Kodak, Ilford, and Fuji. For anything else, you better go to Freestyle Photo in Hollywood.
Pros: Fast, Affordable, Reliable
Cons: Northridge may be out of the way...