"Drive-thru bakery." That is the ad copy on a billboard for McDonald's on Fairfax Avenue in Los Angeles. Did you know the fast-food chain also serves baked goods? Now you do. If you're a busy Angeleno, why spend time parking and going in to a coffee shop to get a muffin or croissant when you can visit the convenient drive-thru bakery? Since McDonald's knows how to serve its customers in new ways consistently, the business thrives in the fast-food niche....