I have seen some of the users have created their chat rooms. I, too, wanted to create my own chat room. So, how can I create, please somebody help me?
Go to the following URL:
Click on "Create a new room" (Note that this option will only pop up for users with over 100 reputation).
Then, a window like this should pop up: Be sure that the "Related Site" is "Mathematics" and choose a Room Name. You may configure the options to your preference, and then click on "create new room".
Note that all conversations are public, regardless of the options you choose.