Free Chicken Fajita Taco at Taco CabanaAfter you claim your free Whataburger on August 3 – if you still have an appetite – head over to Taco Cabana. From 4 to 9 p.m., they’ll be giving away their Chicken Fajita Tacos. You don’t need a coupon to get it. Limit of one taco per person, and only valid at participating locations. Happy eating!