I think the joke is that nobody ever actually enters LC. They just order from there. So there would be no way of knowing if it was actually secretly an entrance to the backrooms
But now that you mentioned it, what is their back room? Do they even have a kitchen?
Or do they all just go to the Little Caesars Dimension and through the
Pizza Portal and fetch us some Hot-and-Readys by negotiating with the outer gods?
This could have been an episode of Reply All, from their “Yes, yes, no” segment. It would go down the Backrooms rabbit hole and back up reminiscing about cheap Little Caesar’s.
Little caesars is just greese and cardboard. Their dough is cardboard, the sauces are greese, the menu is colored greese on cardboard, the windows are cardboard.
All the ones I've been in it's just a bunch of us fat dudes crowded around watching another fat dude say "extra most bestest" to some pimply teenager that hates his life.