Yichusdik, they went on a “machol” — dancing in circles(look in Rashi there). That type of dancing might not be assur to watch. Real “rikud” is, as far as I understand.Plus,in addition, those girls were single and non-niddos.
Secondly, I did not say it’s obligatory to have a mechitza for eating. It is a good chumra, especially, because of the way many women dress — namely, dressed to kill. Look at the beginning of Yishaya and in the relevant Gemora in Shabbos to see what Chazal had to say about it.
Zeeskite, i think you take it too far.It is clear from the Gemora that they were makpid on looks.