This is a biker’s dream, particularly one who doesn’t do it often and is out of shape. It’s almost flat and the ocean is in view almost all the time. I watched some surfers.
We pedaled (the inn lent us bikes) from Playa del Rey to Manhattan Beach (six or so miles), but I could have gone twice as far south if I didn’t have a plane to catch. There were absolutely no cars to worry about. We passed (or were passed by) a few recumbent bikes, a tricycle, and a couple of tandems. We passed a huge power plant and an RV enclave. I drooled over the beautiful homes, dreaming which one I would buy when I became a multimillionaire.
Practical considerations: There are soda machines and public bathrooms every mile or so. Of course, you pass towns where you can find restaurants.