The walkouts in Los Angeles, Chicago and Seattle come after talks between the company and the workers’ union failed to produce an agreement on raises.

Starbucks Workers United, the union that has organized workers at 535 company-owned U.S. stores, said Starbucks has failed to honor a commitment made in February to reach a labor agreement.

Baristas at hundreds of Starbucks in California and elsewhere in the U.S. plan to strike in the days before Christmas as plans to negotiate a contract stall.