Sometimes. It depends on the reason for their stay. Some run into the inn without meaning to, unaware of danger they are in. If they don't believe it's there, they are usually less grateful at the end of it.

[ sometimes... people like to argue... and it is fine. ]

One of my favorite guests is like that. He is a handful, and because of his unusual circumstances I end up seeing him a lot. He would prefer to live a normal life without any supernatural interference though, so he isn't usually happy about it, but it's impossible for him to live like that.