Our Fortnite DJ Booth Dance Club Location Guide features the exact spot you'll need to go to complete the Dance behind the DJ booth at a dance club with the YOND3R outfit challenge in Season 10/X's Boogie Down Mission.
You can find more information on the Boogie Down Mission here.
DJ Booth Dance Club Location Map
Before you do anything, make sure you've unlocked the YOND3R skin and have it equipped. You'll need to have your battle pass leveled to tier 43 to unlock it.
The dance club location is in the snow biome section of the map. It's northeast of Happy Hamlet, in an unnamed area that has been kind of been beaten up overtime. This is an area that's likely going to see some change in the next season or two.
The dj booth can be located on the west portion of this building, there's a huge hole in the side of it that allows you to gain entry. You can also get to it through various other doors on the building, or head intothe actual entrance on the east side of it.
There's a couple of stairways leading up to the booth, once you are there you can just start dancing to complete the challenge.