I've been to Waffle Houses across the South and Midwest and yes, the answer is Waffle House

It's a restaurant chain that is almost always open to the point that there are some locations that didn't even have locks on their doors until covid forced them to shit down.

If the power goes out, they switch to a gas only menu. If gas goes out, they switch to an electric only menu.

The food is not great, but very often the only option in a given town in the middle of the night. Sometimes, it's what you need.