Molasses
This next one seems redundant. Molasses is already quite thick, so putting it in the fridge ensures that it gets thicker and harder? The same goes for maple syrup and other sweet/thick condiments. Because of its thickness, molasses should remain at higher temperatures as a fridge makes it impossible to use molasses properly.
Keep it in the pantry, always. Also, note that an unopened jar of molasses can keep good for about a year. Once it gets opened, it stays for roughly six months, which is still quite the long shelf-life. Please keep your molasses out of the fridge for maximum enjoyment.