In my experience of the at-the-LA-studio test-giving and auditions, there is no full game. You don’t stand at the podiums. You just stand in front of folding tables, though admittedly you do get to use a buzzer that’s (presumably) like the ones at the podiums.
At regional auditions, it’s the same thing (of course they don’t bring the podiums on the road!)
In both cases there’s someone in charge of the entire process (including the test-taking that determines who gets to do the practice game), but it’s all pretty informal. I don’t know if Richards has done that ‘in charge of auditions’ job, but in any case the job isn’t really akin to ‘pretending to be the host of Jeopardy!’