“Ballroom changes lives, you know? It’s inevitable,” said Maru Camargo, who joined Rio de Janeiro’s Ballroom scene about a year ago after moving from the countryside. If you have been to a party in Rio, you may know the outfits, the dancing, the music, the volume. If you have been to a Ball anywhere, you may know the profound moment of convergence when the whole crowd cheers, slams their arms down as a performer confidently hits the floor, only to rise back up again on the next beat. Ballroom in Brazil: You can imagine the energy.