While Chipotle is offering free chips and guac for its customers, Tocaya is giving free guacamole and chips to its loyalty rewards members. Meanwhile, QDOBA, the fast-casual restaurant chain in the United States and Canada, has announced a buy-one-get-one (BOGO) deal for its reward members. Del Taco - The fast-food restaurant chain has announced a BOGO deal for its guests to celebrate National Avocado Day. - The fast-food restaurant chain has announced a BOGO deal for its guests to celebrate National Avocado Day. – The fast-casual restaurant chain has announced free chips and guacamole to its guests on Saturday (July 31) to celebrate National Avocado Day.