Presentations are being held at the same time as dancing, but in a different location. LiveCam can only stream a single location so it will continue to stream the main hall. Why? Because to dismantle the system and move it to presentations, then do the reverse and bring it back, is just too difficult as I am also taking presentation photos at the same time.
I will work on the physics of being in two places at one time - perhaps ZandB can give me a hand with this :)