Is mixed seating at weddings ok? Can you explain why we sometimes see mixed weddings and sometimes not. Is it family traditions? 30 years ago it appears in old pictures that mixed weddings were ok.
It is certainly preferable that seating should be separate.
The Kitzur Shulchan Aruch (149:1) writes that when seating is mixed, the blessing “she-ha-simchah bim’ono” is not recited, because this is not a situation of simchah, but of tza’ar.
Other authorities argue that because mixed seating has become customary, the blessing can be recited even when seating is mixed (see Levush, Minhagim 36). Of course, this refers to mixed seating where women are modestly dressed.
Dancing must either way be separate, with a partition between men and women.
The question of mixed or separate seating is not related to family tradition, but a question of religious observance. Today, unlike previous generations, the custom (without exception) among the strictly Orthodox is to have separate seating.