While you’re making plans for Taco Tuesday, keep in mind that two taco festivals are taking over the town later this week, which means that everything from traditional tacos to cutting-edge creativity — right down to the masa that goes into the tortillas — will be available for taco fans. Both festivals, Top Taco and the Denver Taco Festival, started three years ago, an extension of the taco craze started by Roy Choi and his Kogi taco truck in Los Angeles.