Which version of the AOL Desktop has chat rooms?
The chat rooms feature has been changed by AOL. The new version of the desktop does feature chat rooms, but they're divided somehow and AOL created a FAQ page which provides all the necessary information related to chat rooms and how to connect with them.
You can find more about it on the following link: https://help.aol.com/articles/finding-public-chat-rooms
Note: Always download the latest version as explained on the page.