A North Center Trader Joe's became the first unionized location in Illinois, more than two years after employees cast votes to join the union. The grocery store, 3745 N. Lincoln Ave., will become the fifth in the country to join the Trader Joe’s United independent union. “For the Chicago crew, … [this is] an example of how grit and constant fighting can lead to these results, despite the fact of how much money Trader Joe's has and how much appeal power they claim to wield,” Trader Joe’s United