The desirable, varied communities of Santa Monica, Venice, and Malibu curve along L.A.'s coastline. These high-rent areas hug Santa Monica Bay in an arc, from the ultracasual, ultrarich Malibu to the bohemian-seedy mix of Venice. What they have in common, however, is cleaner air, mild temperatures, often horrific traffic, and an emphasis on the beach-focused lifestyle that many people consider the hallmark of southern California.