The Dina clip was taken in the Mena House main ballroom, but it looks like a private party, e.g. wedding, anniverisary, or the like. As Shira said, dancers have more leeway at private parties held indoors. If ta party had been at an outdoor place where the general public could see her, Dina would probably have worn a higher waisted skirt with a bit more body coverage and/or her belly chain and paid the fine (if any) later.
