They basically are ghost kitchens already. Who eats at a pizzeria? The last time I can remember doing so in like 2 decades was in NYC. They have the store fronts so people can pick up rather than deliver.
Pizza Hut has for many years in a lot of locations maintained more of a restaurant focused approach, often serving AYCE buffet as a destination with proper booths and table service. They have a bunch of retro styled locations in the States that still offer that experience. There’s a pretty neat one that I like in Fredericksburg, TX. The full list of classic locations that I know of is here: https://rolandopujol.substack.com/p/the-retrologists-guide-t...