So again it is ridiculous to say a father can’t dance with his daughter. If you look at the Rebbe mitzva tanzen you will see that even the biggest Rebbeim don’t even use a gartel when dancing with their daughters.
And to say that when a father and brothers come to the girls side excitedly to dance with the Kallash they have in mind to look at the other girls is the most outrageous and ridiculous comment in this whole entire thread. Really it not only lacks maturity but seichel. Have you ever been in that position that your own sister got married that you can even remember being so excited for your sister? You are not a parent so you can’t imagine what it feels like for a father to dance with his daughter, or a daughter to dance with her father or her wedding day. And there is nothing assur for a family to dance together which doesn’t ALWAYS happen. In addition, the mechitza does NOT come down, and the other people don’t mingle and go back and forth.
Furthermore, people have different minhagim, and if it is NOT your minhag for the Kallah to go to the chosson’s side or vice a versa you should stop commenting on it, you should just stand behind your own opinions and just leave. You shouldn’t suffer because of other’s minhagim but YOU shouldn’t put them down for it either. I certainly don’t participate in a mixed dancing affair and If it bothers me, I will leave. My job is to be misameach chosson v’kallah and not criticize what others are doing.
Furthermore in my humble opinion, I find a mitzvah tanz where the Kallah dances with ten or even more men that she does not know or have any connections to extremely not tzniusdik even with a gartel. The nicest mitzvah tanz is when only the chosson and kallah’s fathers, uncles and brothers dance with the kallah aside from the chosson himself. I always feel sorry for a kallah when she stands there so awkwardly while both strange men and women stare at her looking at her reaction while these strange men prance around the room. Honestly how tzniusdik is that? And that can go on for hours.