Coffee is a difficult business for a restaurant chain to break into. Just ask Krispy Kreme Doughnuts Inc.
The venerable doughnut chain has long looked to increase its sales of coffee because customers drink coffee a lot more than they eat doughnuts. Yet coffee is only 5 percent of Krispy Kreme sales, even though coffee goes with doughnuts like, well, coffee and doughnuts.
But now the chain hopes it has the key to change that. Krispy Kreme has opened a new restaurant ne