I went to Brittany, France a couple of years ago with some friends. When we got to our hotel room, (which was quite late) we found ants everywhere, they were all over the beds, and in the bathroom.
However, we were told we couldn't swap rooms, and were given the ant killer stuff which totally stank up the room.
Now i know they're only ants but i dont want them crawling all over me when asleep. They could crawl in your mouth or your ears or something! yuk!
we ended up sleeping on the beach that night, and found another hotel the next day.