Fondly remembered by students, layabouts and late night drinkers (surely that's all of us at some point) is a night time show called In Bed With Medinner, hosted by Bob Mills, who sat on an Avengers-style set and pulled out some gems from the TV archives, then proceeded to rip them apart.
It was TV gold and happily, a number of clips have made it to YouTube. Check out this one from 1980 - the Yorkshire Disco Dancing Championships. Every bit as bad as it sounds. And if you enjoy this, check out the rest on YouTube, there's a seemingly endless supply.