Jamba Juice

This 750-unit quick-service chain is primarily known for its beverages, including smoothies, fresh juices and teas. In recent years, it has added more food to the menu while emphasizing healthfulness. The chain’s chief executive, James White, has also targeted growth with menu upgrades and new store formats. In the latest year tracked by Nation’s Restaurant News, the chain earned $439 million in U.S. systemwide sales.