Plays "Mr C The Slide Man - Cha-Cha Slide" during the dance on council of blood.
File needed:
https://drive.google.com/file/d/1Zblcg9H9F73C2YPeXTZSFvuAqFBE24C1/view?usp=sharing
Go to your WoW directory -> Retail -> Interface
Create a folder called "Sounds" and paste the sound file in there.