ADDISON, Texas--(BUSINESS WIRE)--Fiesta Restaurant Group, Inc. (NASDAQ:FRGI), parent company of the Pollo Tropical® and Taco Cabana® fast-casual restaurant brands, has signed an extension to its multi-year product and marketing agreement with The Coca-Cola Company (NYSE:KO). Fiesta and Coca-Cola previously announced their multi-year product and marketing agreement in February 2014, when Fiesta consolidated all of its fountain beverages commitments for both Taco Cabana and Pollo Tropical under t