This is what occured to me a long time ago - what is the difference between playing a boot or an mp3? I see many fliers stating that the music at some event is on '100% vinyl'. For me there is one word missing - 'original'. I agree it's everyone to there own, and I wouldn't slag off, or even refuse to visit, a venue where I know boots are played, but I don't see why CDs or mp3s would be banned at such places.
I believe there are occasions when there is no alternative but to leave the vinyl at home. Normally I only play OV, and at a bona fide soul do that is absolutely the case, but I also play fairly handbaggy nights in pubs that may last for 4 hours or more. I can't cover all the requests I'll get with any sort of vinyl, original or otherwise, so I take my laptop. The punters know what's going on and don't mind, so long as I can play pretty much anything they might ask for. If the punters are happy, the pub is happy. Strictly, I may be denying my own stated position on OV, but sometimes circumstances dictate a more pragmatic approach.