Matt, it's funny that you showed "Go." Back in my senior year of high school, 10-11 years ago, I would bring in a tape or two with me to class towards the end of the year, because we had 80-minute classes, and the teachers seemed to always run out of stuff to do, as they had senioritis as bad as I did by early June.
One of the shows we would watch most often was an episode of "Go," taped during the "dark period," with JoAnne Worley...and I remember my friends and classmates being just as fascinated with the format. When we would watch the show, it was a completely optional thing, and you could do other things if you wanted, but most of the kids watched. It interested one of my teachers enough that we staged a game of it to review history facts, I believe. Very easy to set up a game of "Go" in a classroom with rows of desks...and not that hard to explain the format beforehand.
Another one that pops in my head is Blockbusters; I remember staging a Blockbusters game in one of my classes as well, using quiz bowl buzz-in equipment.