With the release of Patch v3.5.0 earlier today, multiple ‘Disco rooms’ have been found across the map. While no information has yet been released, it is possible these could be used for an upcoming challenge in Season 3.
Another possibility is that they have some relation to the #BoogieDown contest which ended this morning, only time will tell. Here are the rooms players have found so far:
‘Haunted House’ near Pleasant Park
RV Park near Retail Row
We will update this post if any additional information is found.