Whilst I don't think there are any unwanted guests at my house (ghosts), I have been to Leicester guildhall which at the time of me going (about a year ago) was meant to be the most haunted place in Britain. It was pretty creepy as the people who owned the place had put mannequin's into the jail cells dressed up as former prisoners. The jail cells had no light in them either, and you had to switch a light bulb on and the room would light up showing the prisoners creepy faces and positions. Apparently the guildhall has 5 ghosts that come out and about from time to time. I explored the building on my own and I'm not gonna lie, I was pretty cautious (bloody scared), but I fought on and completed the building looking at the old books and things lying about.
The freakiest thing though was when I went into the library I saw a little wooden chair lent up against the wall. I took no notice at the time and continued to the room on the far side of the library. I looked through an old book lying on the table that apparently opens every night even if you close it. When I came back through the library the chair was lying on its side. I looked and pondered for a second before I realized it wasn't like that before and I knew I was the only one in this part of the building as a small concert that my uncle was performing at was being held in the hall on the other side of the complex, and only people watching that were allowed in, my sister was too scared to go any where near where I was and stayed with my parents and we were to only people not interested in the concert, it couldn't be the staff who moved it as they were at the reception of the place so I thought to myself "shit, I am getting the fuck outta here" and ran down the stairs and out into the courtyard. I told my mother and she dismissed the idea. My dad on the other hand said that one of the ghosts likes to move things behind peoples back and I was too shocked to disagree with him.
After 5 minutes or so of watching the concert I got bored and went back in and explored the rest of the building with no problems. So there is my story of the time I went to Leicester Guildhall and scared my socks of.