Starbucks' new dress code for baristas has sparked a strike at 75 U.S. stores, with more than 1,000 workers protesting the new policy, a union representing the coffee giant's workers said Wednesday. The new dress code, which went into effect on Monday, requires employees at company-operated and licensed stores in the U.S. and Canada to wear a solid black shirt and khaki, black or blue denim bottoms under their green apron. Under the previous dress code, baristas could wear a broader range of dark colors and patterned shirts. #starbucks #barista