Hey, I got my very own planar map location drawn by Dyson Logos!
No matter how ridiculous the setting, the PCs are going to go looking for a tavern. So here is a tavern sitting on the Plains of Endless Salt, baking under the nine suns of one of the nameless Violet Hells.
The tavern isn’t a large establishment, but the unique structure makes it memorable, and any source of liquid on the plains of endless salt would seem a godsend. And word is their margaritas are on point.
Dyson Logos: The Crystalline Tavern of the Plains of Endless Salt
Planescape comes to mind here of course. But this could be used in any D&D or FRPG campaign.