Haha! What an experience!
I’ve not been anywhere like that, but I have a had a couple of experiences where it was so bad it was like being in faulty towers or some candid camera joke. So bad it was actually really entertaining, but never went back.
In terms of the OP, fekking weirdos! And baked beans with fish and chips is just wrong! I eat bits of everything together, and would always eat the fish before it got cold, leaving a few chips to mop up around the plate.
Though to be fair I would probably disgust a few as I like curry sauce on my fish and chips, along with a splash of tomato sauce and mayonnaise! A great combo 😁