Baristas at about 100 unionized Starbucks Corp. locations have walked off the job since Sunday over the company’s new dress code, according to the labor group representing the workers.

More than 1,000 Starbucks baristas at 75 U.S. stores have gone on strike since Sunday to protest a new company dress code, a ...

The strike at 75 stores began on Sunday the day before the previously announced rules about what Starbucks baristas can wear ...