Workers at a Seattle Starbucks on March 22 voted unanimously to unionize, giving the Starbucks Workers United, an affiliate of the Service Employees International Union, one of its most high-profile wins to date. Starbucks is headquartered in Seattle. Of the 13 employees eligible to vote at the state’s Broadway and Denny location, nine voted in favor and none voted against joining the union, according to the National Labor Relations Board (NLRB). One ballot was challenged, according to The Seattle Times. Workers at the branch in the Capitol Hill neighborhood previously said they were organizing the union vote as “a commitment to growing the company and the quality of our work” and that the desire to do so was not “a reaction to specific policies, events, or changes.” “We see unionizing as a fundamental and necessary way to participate in Starbucks and its future as partners,” four of the employees wrote in a letter to Kevin Johnson, CEO …