At our local fireman's carnivals (yes, I will have to bring up SMALL towns, once again) they fry tons of french fries, and you get the delicious thick cut greasy fries and DOUSE them with vinegar.........mmmmmmm it is almost carnival time.
AND: when i was growing up, we used to eat plain noodles (like macaroni and cheese before you add any cheese), and pour vinegar on them, with salt, and consider it dinner. (okay, there were other things to eat, too, but as a kid, I remember ONLY eating the noodles with vinegar)
I have never been able to convince my own Dkids to try vinegar on their noodles. THey like plain, plain, plain, not even butter on them!