I hope this is relevant to your questions, no answers but my opinion.I had a discussion with a local Dj last Saturday night that touches on one of the questions you ask.We were talking about how certain tunes get broken, not the obscure but but what would have been considered just Soul records back in the day, I think this has been touched on on another thread but please bear with me, we were talking about sounds like Marvin Gaye Come Get to This, Hold Back the Night which seems to be getting some plays, I noticed Len I think it was on here saying he had played something by Chic.My mate the Dj said he had played a certain tune six months previous with dance floor clearing properties only for a guesting bigger named Dj to play the very same tune two months later and it filled the floor, same venue, basically same reguilar crowd, why the difference?
I'm not a Dj ,never have been never will be but I am aware it must take a fair amount of knowledge and skill to read a room and put a set list together, I have recently seen a relativley quiet room lifted by the Dj playing the right tune at the right time.I think the scene is the sum of its constituent parts, we all have a part to play, I can have a great night without dancing as long as the music is good, many times in the past I have spoked to Dj's after their set to apologise for not dancing but to stress I thought they played a good un', I've always thought a little appreciation goes a long way . Got lost in my thoughts now and the funny farm beckons, a walk in the dark and pissing rain should clear my head until the berer kicks in tonight, hope this had a semblance of relevance.