No fridge for me.
Not only are you putting cold sauce on hot food, the flavor changes. Like the poster says above, ketchup on fries is a perfect example. When it's cold it ruins them, as well as the flavor being muted. When it's room temp it opens up and breathes, and all the flavors pop. Like a room temp red wine that breathes in a glass. A refrigerated red is more muted and does not breathe/pop.
If you want, take it out of the fridge 2 hours before you eat and it will be room temp, and store in fridge.