Naysberg: I have heard the phrase used by many Rabbonim, some “MO”, some “Yeshivish”.
Here We Go Again: Please tell me that was facetious. A wedding should not be about making sure that every possible guest should be accommodated. The sheer ridiculous implications of that should not need to be expounded upon. (Also, what about the people who will not attend if it is completely separate because they would be insulted if they can’t be seated next to their spouses?)