I live in Thousand Oaks, so I can offer some suggestions:
Rustic Canyon - Beautiful links style course. Feels like you're in the middle of nowhere.
Sterling Hills - technically Camarillo but a very nice course that is well maintained.
Los Robles Greens - The only muni in T.O. Just changed over to Eagle Golf management and is in a lot better shape than in the past.
Tierra Rejada - 15 min north of T.O. Nice, but more expensive
Moorpark CC - farther away and more expensive still, but 27 holes to choose from and in great shape
River Ridge used to be where the Dallas Cowboys had summer camp. Gets windy on the back 9.
There is a lot of golf around here, so PM me if you'd like more info.