https://www.gamespot.com/articles/all-fortnites-3-boats-and-dance-floors-locations-w/1100-6458203/

Week 8 challenges in Fortnite: Battle Royale involve several objectives that you may need some assistance in completing. There are three challenges in particular--involving dance floors, three boats, and vending machines--that are not immediately obvious based on their descriptions. Here's how to tackle those, as well as the remaining Week 8 challenges, for Battle Pass owners on PS4, Xbox One, PC, and mobile.