/ AFP / Bill Wechter (Photo credit should read BILL WECHTER/AFP via Getty Images)Hundreds of fast-food workers in California will join a new union Friday, a first of its kind for the industry. The California Fast Food Workers Union will be affiliated with the powerful Service Employees International Union, which is also the force that was behind the Fight for $15 campaign, aimed at raising minimum wage. Unlike a traditional union, the fast-food worker’s union is launching as a so-called minority union representing a small share of the industry’s workers with the goal of expanding its ranks, though the union could face challenges in growing its ranks. Workers who join the union will pay $20 in monthly membership dues in exchange for union resources and support. As part of that legislation, SEIU and fast-food companies reached a deal to raise the state’s minimum wage for some 500,000 fast-food workers to $20 an hour by April.