I once went to stay in a B&B in Wales with my mum and my two boys. We usually stay in the premier inn or with our family but on this occasion we couldn't get in anywhere else (it was a family wedding we were attending) and so we booked into this place.
The moment we got there I just felt off. The owner came to the door and let us in, all smiles and friendliness but...I couldn't put my finger on it, but he made me wildly uncomfortable. He showed us to our room, which was a huge family room, with two single beds in one area, then a little corridor with a bathroom and then another room at the end of this little hall with another two single beds. We dumped our stuff and headed out to see the family. I remember my mum laughing at me as I'd really taken against the owner.
When we got home later the plan was for the two kids to sleep in the room at the end of the corridor. Well, they just wouldn't have it. They both cried (they could see us from their beds) and were really distressed, so I swapped places with my youngest. I didn't sleep a wink. I was frightened all night long, I'd drop off to sleep and wake up a moment later with a start staring at a weird door that was in the room. Just felt dread all night long.
The next morning, I dragged myself downstairs to breakfast where the owner stood at our table with his burly arms crossed just talking at us the whole meal
. During the course of this conversation he asked us how we slept. I said something like "well, it was a long journey and I was tired but I just couldn't settle" he said "[creeeeepy chuckle] Oh yes, we get lots of people say they have trouble sleeping in that room [mad eyes], once we had a pair of elderly ladies staying and they complained they couldn't sleep in there so that night I dressed up in some of the old clothes we found in the loft, covered my face in talc and let myself into their room in the middle of the night! [creepy laugh] How they screamed!"

I swear on my life this is true.
Fucking loon. Mum didn't laugh so much at my dislike of him after that. We had to stay another night and again I didn't sleep a wink but this time I was frightened of the man.
They did a midnight flit and no longer run that B&B!