No kidding Mocking......That happened to me at a job. They recognized me too
but didn't know from where. I didn't tell them that it was a dream....because they would think I was nutso!! Same goes for you!( Or that you are coming onto them in a creepy fashion, depending on the circumstance.)
Yea...don't bring it up unless they do first.
Why should they know that? There's really no good reason...Chances are they wouldn't be able to handle the information. Or there is a chance that you really are crazy.