Key TakeawaysUnionized Starbucks baristas in Chicago, Los Angeles, and Seattle have gone on strike in a pay dispute with the giant coffee retailer.Starbucks Workers United said the walkouts would expand throughout the country and run until Christmas Eve.The company argued the union has made unrealistic demands, and said the strike has had little impact on its operations. Starbucks' (SBUX) unionized baristas in Chicago, Los Angeles, and Seattle have walked off the job in a pay dispute, with the union represe ...