I'm not sure if you're familiar with it, but many of the Mardi Gras krewes have a huge party after the parade finishes its route and they call it a Ball. The end of the parade is like the end of a fireworks show where everything goes nuts. Bacchus is one of the big parades, and they roll into a huge arena (it used to be the Superdome for Bacchus, but that was a long time ago).