Ben: I believe that R’ Shternbuch in the T’shuvos V’hanhagos quotes holding hands from the Chuppah to the Yichud room.
ZD: Look at that Gemara again. He was allowed because there’s no Derech Chibah because she was like a Korah Shel Eitz (I think I once saw a Tzitz Eliezer attempt to answer why there’s no Issur for her but I don’t remember). But if there was a separate Issur of Pritzus of dancing in public then it should have been Assur anyway. Thus, at the very least, we are Mattir this dancing for the purpose of Simchas Chassan V’kallah. I still think it’s a strong Ra’aya.