Excuse the pun but most "ballroom" and Latin dancers do not wear dance belts, although most should
Some still wear boxers which, at the least, could be injurious but most make do, reasonably so, with good supporting boxer briefs.
Like many athletes who have abandoned jock straps dancers who dont appear in tights are happy with good fitting regular supporting underwear.
Try boxers under tights and get arrested!
When jock straps were devised/invented they certainly provided more support than boxers. However, in modern times they are pretty ineffective in comparison to modern underwear. Nevertheless, for fun they are as hot a hell lol
If you re extremely large or are likely to be on show in skin tight clothing a dance belt might be a very good option for you extr hung guys