This Fast Show parody of BBC2 late night jazz programmes of the 1970s has had a big - indeed permanent - influence on my household; mainly by its catchphrases and gestures 'aside' to the camera - especially a purred Great! while making the OK sign.
I can vouch for the fact that this was exactly how British jazz fans behaved in those days - on the media and IRL. I vividly recall a middle aged chap in a velvet jacket tapping his wineglass with his index finger at a modern jazz event, gently nodding along with half-closed eyes.
He'd have fitted right in with Louis Balfour.