@ladler: Thank you for clarifyng and articulating to @gadolhadorah how unzerer are feerzach.
Any information in the shidduch parsha should be kept under wraps and be restricted to a need-to-know basis.
If you go to a hotel lobby in frum cities, you can expect that there will be yeshiva bochurim and seminary girls going on dates. That is just the environment that is most conducive to do so and just happens to be in the public eye. But until the shidduch is signed-off on by the shadchan, the dating couple should not be seen walking together in the community on Shabbos or otherwise. Indoor and outdoor dating activities need to be done outside of the public eye. Of course, it’s possible that someone will see them and recognize one of them. But that should not be the norm.