Fast food workers from around the country are gathering outside Chicago this weekend to build connections and plan their continuing fight for a $15 an hour wage and the right to unionize, demands around which a series of one-day strikes have centered: About 1,300 workers will attend sessions Friday and Saturday at an expo center in Villa Park, Illinois, where they’ll be asked to do “whatever it takes” to win $15-an-hour wages and a union, said Kendall Fells, organizing director of the national effort and a representative of the Service Employees International Union.