I didn't even know this show existed until I read this thread. It's not on WBEZ in Chicago.
I should probably check for more radio game formats, but most of them seem to be current events quizzes here in the States and thus have a short shelf life (in the UK, Just a Minute has been on forever). I had problems distinguishing the difference between Whad'Ya Know? and Wait, Wait, Don't Tell Me, which have somewhat similar formats. Generally stations run one or the other, but I didn't listen to the latter for years because I was confusing it with the former (I don't particularly like Michael Feldman, who had a short, unhappy tenure as an evening cohost on WGN).