 YHATZE Local One engages in collective bargaining with the League of American Theatres and Producers (the League), an association of Broadway theater owners and producers.YHATZE Local One was formed in 1886, and represents about 7,000 stagehands and other theater workers in the New York City area.Roughly 450 to 700 of its members work for Broadway theaters, building, installing and operating scenery and sound and lighting equipment.