https://www.gamespot.com/articles/fortnite-update-602-patch-notes-disco-domination-l/1100-6462410/

Epic Games has launched patch 6.02 for Fortnite on PC, Xbox One, PS4, Nintendo Switch, and mobile. The update introduces a funky new Limited Time Mode and a powerful weapon for Battle Royale, while the Save The World gets a special new weapon too. The new Limited Time Mose for Battle Royale is Disco Domination. “Break out your best moves and take control of the dance floor in this new Limited Time Mode,” Epic says on the official Fortnite website. This mode is effectively King is the Hill, with players capturing a specific point by dancing it and defending it from enemies.

"Five dance floors will appear on the map whenever the storm is not moving," Epic explains in the notes. "Emoting on a dance floor when no enemies are present will raise a disco ball in the center of the floor, and capture it for your team. The more friendly players dancing on a floor, the faster it will be captured. Once a floor is captured, it will begin filling the team’s “dance bar” on the HUD, until either an enemy stands on it or the current storm timer ends and the storm begins to move. The first team to fill their dance bar to 100% will win the match."