Here's where Starbucks workers are striking in Southern California

Starbucks baristas at some unionized stores across the country are on strike, including locations in Southern California.

Workers at coffee houses in Long Beach, Santa Clarita and Seal Beach walked off the job Thursday on "Red Cup Day" — an annual event where the coffee chain gives out free reusable cups. They joined baristas at the Downtown Disney Starbucks, who started their strike on Saturday and closed down the store.

The strike is part of a nationwide dispute between the union representing workers at more than 550 of the coffee chain's locations and Starbucks, who have been bargaining a contract for more than a year. Last week, unionized baristas voted to authorize a strike, accusing Starbucks of refusing to budge on their demands for higher pay and better hours.

"The cost