Starbucks will open its first juice bar, under that name of Evolution Fresh. The coffee store chain has moved into other businesses before. This includes the sale of its coffee in bags at grocery stores, the introduction of its Via instant coffee line, and new single serving products for coffee machines. But, all of these “extensions” are part of its core coffee franchise. “Juice” is not. Management consults often say the most successful companies over long periods of time are those that “stick to their knitting”. Starbucks has decided to ignore that.