Isla Vista, California is pretty solidly bike friendly. UC Santa Barbara next door is a Gold Level Bicycle Friendly University. Isla Vista is mostly student housing so in the summer it's pretty laid back.

I.V. is right on the Pacific coast. The refugio oil spill is several miles up the coast though. There are cars there. If you are feeling adventurous, you can get out to Santa Barbara and environs, though the airport is right next to the university.