, /PRNewswire/ --Â Chipotle Mexican Grill (NYSE: CMG) today announced "Chip-or-Treat," a new exclusive offer for Chipotle Rewards members delivering free treats throughout October to celebrate Halloween. Building on more than two decades of its iconic Boorito tradition, Chipotle is making this Halloween season even bigger with its real food offers. Starting today, October 6, Chipotle Rewards members who purchase an entrée each week will receive a new weekly treat from Chipotle, plus an exclusive Rewards bad ...