Nearly two dozen protesters — a mix of local fast-food workers, area union members and supportive local residents — held signs and chanted for higher fast-food wages early Thursday morning outside the Dunkin' Donuts shop at 5302 E Busch Blvd. in Tampa. The national protest, scheduled at fast-food locations in 100 cities across the country, seeks a wage increase to $15 an hour and the right to organize without corporate interference. Amid a variety of chants on Thursday morning, one played off the Dunkin' Donuts slogan. "What does American run on?" the bullhorn boomed. "Justice," the protesters replied. The store served its doughnuts to customers without interruption.