Naugles had that. IIRC, their burrito selection was as follows:
Cheese (Cheese, red sauce)
Red (Beans, red sauce, cheese)
Green (Beans, green sauce, cheese)
Combo (Beans, 1 scoop of beef, red sauce, cheese)
Beef (2 scoops beef, red sauce, cheese)
You could then make any burrito “MACHO” (add the other red/green sauce, lettuce, olives, sour cream, cilantro, tomato).
Red = Mild / Green = hot (less mild is more like it)
They later added chicken and other types of burritos.
If you are interested in some Naugles procedures, read on, otherwise, skip it:
Taco meat came raw & frozen in 50 lb. bags. We went through about 2 bags/day, cooked in a big pan. When it was cooked, we would lift one end of the pan to let it drain the fat for a while. Scoop the meat out into its own little containers. I can’t remember what we used to season the meat. IIRC, it was a big pouch of seasonings.
Pick up the big pan and pour the fat into a steel cup. Take some of the fat and pour it into the refried beans. Once the fat in the steel cup started hardening, we dumped it into a big barrel outside the back of the store.
Beans came raw in a canvas sack. We sorted out the rocks from the beans and cooked up two big batches a day. Add beans to big pot, add water, slow cook for an hour or two. Most of the water would evaporate. Melt hunk of lard & add to beans, using the lid to the bean pot as a shield to prevent molten lard from splashing up from the beans into your eyes. Slow cook some more, mash 'em up by hand using the bean masher.
Now and then, someone would add too little water, apply too much heat, or forget about the beans until we could smell them burning. The beans would end up burnt. We would have to do taste tests to determine whether to toss 'em or use 'em. If it was a close call, IIRC, we could add more meat fat to help mask the smoky taste.