In N Out. When you think of Southern California fast food, In N Out is what comes to mind. Whether you have never been to one or you spent your entire life in SoCal, you just can't help it; Whether you know better or not, In N Out is what always comes to mind when you think Southern California burger joint. But, there is another SoCal based local favorite that, even though it's loved by many, seems to always be forgotten. The Hat.