Eruson
Let me tell you the exploits and hacks you need in order to create a private room.
I remember when I wasn't a moderator, I also scrolled days and days through the sites source code in order to play music. So I hope this helps you a little.
Step 1.
First of all, you need to click on a button called "Create Room". It's at the top of the website.
The next step might be a little confusing and it takes some real h4cking skills, I advice you use Kali Linux for this next step. Use a CURL POST-Request to perform it, otherwise it might fuck up your global variables. If you want to be extra save, install a Virtual Machine.
Step 2.
Click on a button called "hidden room" or set the room size to 2.
In case you made a hidden room, share the URL with the person you'd like to join.
I normally don't do hacking tutorials but I did this one anyways.
Have a nice day. 🙂