One of the gems of BBC2's Friday night line-up when I was in high school was the "celebrity game show" Shooting Stars. In fact, it was a part-scripted, part-improv comedy show hosted by Reeves and Mortimer, and was basically just half an hour of celebrities being made the target of cheap jokes. (It was also Matt Lucas's day job before Little Britain.)
YouTube is pretty thin on clips, but this one of Jarvis Cocker doing the 'final challenge' is pretty representative: