I've eaten at a Domino's with only one or two tables and no bathroom. I don't recall what state, possibly Arizona.

But I've done a fair amount of traveling and Domino's seems to position themselves as basically a carryout window. You can call and you can order in person, but most locations seem to do the vast majority of their business via the online ordering system.

They print off labels, slap them on the appropriate boxes and begin making the food. Some locations do a brisk business while only having one or two employees on site, plus one or more delivery drivers.

The employees sometimes clearly find it to be a hardship to take orders by phone or in person. It interrupts their workflow and they are frequently very busy just trying to fill orders coming in off the website.

This is a state-by-state thing. In Michigan, restrooms are required if dine-in is available. In NYC and Boston, there are numerous eat-in places with no bathroom. Good luck washing your hands before eating.