Yeah, that's the case for most LA muni's on the weekend. Not quite 6 hours, but close. Like others said, Rancho is the worst. In Long Beach, Skylinks is the best I think, followed by Rec Park and El Dorado. Lakewood is always bad though, you can likely have a 6 hour round there on the weekend. I try to avoid muni golf on the weekends. Better to take the drive and pay a little more for someplace else. Skylinks will put out 5-somes before first light - I haven't played that early there in a while, but they use to give you balls that lit up when you hit them, and would have spot lights on the 1st tee box, and put you out in the pitch dark of the dawn.
Wow, after typing all that out, I realize how much I hate muni golf on the weekends!