In real life, it was simply a practical stage layout:
* Two entrances/exits for speakers;
* Paths from each entrance direct to the podium;
* Areas on each side of the center for groups or panels;
* The edges of the stage are outlined in a contrasting lighted color for safety.
If they keep pushing it, this faux-"Gotcha" is going to blow up in Proggies collective face, in gales of laughter.