Thanks! I googled it, but I couldn't find it. This map author claimed that Binger and Ook stole their dance floor from a map called lightrefs, but lightrefs doesn't even have a disco floor. It's just a long black hallway.
I was reading the comments section to this jk2 map, and I saw the controversy so I was curious for some reason.
Link to Elite Council map on jk2files.
Have a look for yourself.