Starbucks workers in three locations in Buffalo, New York, have voted on Dec. 9 to unionize, the first U.S. stores to be represented by a union in the company’s 50-year history. This comes after the majority of ballots counted by the National Labor Relations Board (NLRB) from among the 100 Starbucks workers eligible to vote were in favor unionization. The employees will now join Workers United, an affiliate of the Service Employees International Union. The unionization push in New York has the potential to encourage similar efforts for about 235,000 employees in 9,000 U.S. locations at the second-biggest chain store in America. Starbucks attempted to put a halt to the unionization drive, but failed after an NLRB decision on Dec. 7 decided in the workers’ favor. A Starbucks in Mesa, Arizona, has filed petitions with the NLRB to form its own union, which will be decided on Dec. 10. “We have …