More than 1,500
Seven hotels in Boston are affected by the strike, including the Ritz-Carlton Boston and the W Boston.
Marriott workers have been threatening to strike for the last few weeks in seven other cities: Detroit, Seattle, San Francisco, San Diego, San Jose, Calif., and on the Hawaiian Islands of Maui and Oahu.
The union and Marriott have been negotiating...
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(Updated with additional reporting.)