We decided to branch out today though and called an Uber to try Ley Plaza. It's probably less than five kilometers away. It has a seriously larger format and had expanded merchandise on offer.
Uber is so convenient here at approximately the same prices as bus tickets for two people. The little extra is worth it for the door-to-door service. Plus, money is going into the pockets of entrepreneurial families.
We gladly found a roast chicken restaurant at the same location. In all previous Mexican cities, we've always had easy access to roasted chickens to go, whether at franchise restaurants or as part of a supermarket. In Mazatlán, however, they seem extraordinarily rare. That is another reason for us to occasionally do grocery shopping where we did today.