I live in a suburb of Los Angeles. It is a great place to ride. I'm in the north of L.A. county, close to the Ventura County line. The streets are wide, there are many bike lanes, and anything I want is within convenient cycling distance, I never have to go into L.A. There is a huge and vibrant cycling community and, of course, the weather is fabulous. I can get to the ocean via bicycle almost as fast as driving on a dirt trail where cars are not allowed. The Santa Monica Mountains are near and they are true mountains, terrific for road and mountain biking.
The perplexing thing is that there are very few commuters. Mostly what I see are recreational cyclists on carbon fiber road bikes in lycra. Cyclingwise it is very provincial, for examples, rarely do I see a fixie and many cyclists don't know what a gravel bike or a Plus bike is.