So right, if the issue is men watching women dance, the mechitzah doesn’t do a thing. So is your contention that men and women shouldn’t sit at the same table?
Perhaps providing a kosher outlet for people to meet (and yes, a wedding is a kosher outlet), many people would not have to go through the stress of shidduchim. Plus, once you meet a person you have some sort of connection to, you can still do your research to make sure the person is a good person and doesn’t use a plastic tablecloth.
I really want to know what licentiousness occurs around a table of men and women. Perhaps the same licentiousness that would occur at a Shabbos table?