My wife and I have gone to In-N-Out after fancy dinners on a number of occasions.
the best meal i ever had in my life was at Bar Crudo on Divis in SF. owners pivoted to a taco place, for reasons unfathomable to me. had a dinner that blew my conception of food open, went to a show nearby after.
got home at 3AM and made myself a bit of sausage and toast and to my surprise the experience of my prior meal persisted, and in contrast my late night snack seemed like it was made of cardboard.
It is a bit odd to wear a tux or suit to an In-N-Out at midnight, but after a few times you get used to it.
I'd be happy to eat elsewhere as well, but there aren't a lot of options at midnight.
Five Guys has very crispy and tasty fries — especially the cajun style — that are not double fried. [2]
1: https://www.foxnews.com/food-drink/this-is-how-mcdonalds-mak...
2: https://www.delish.com/uk/food-news/a37315383/how-five-guys-...