21
I just realized, not that this would be on anybody's radar, that for the last few seasons of QuizBusters, WE had a cold open! We would play our first set of ten questions with me standing in the audience section, then I'd throw to a recorded open before taking my usual place. In a cursory check, I couldn't find an example of it on YouTube. Most of the episodes that have been posted go back a lot further than that.
Soda Jerk, made to look like a giant soda fountain.
-Jason