I know this is about knowingly meeting another crossdresser, however, to provide a bit of support for our slice of normal, a different take on this..
Truth be told, if you are in a group of 100, there are likely between 2 and 5 of those present who are crossdressers. So... you likely have met many, know many, but don't know that part of their personality any more than they know this special part of you.
Lauren