I've always been rather surprised by the idea of there being a special person to play other people's gramophone records.
I'd be very interested in listening to some 1935-55 Argentinian Tango, Warren. Where shall I start?
Have you ever been to Argentina, Warren?
It means you should interact with the crowd by selecting the music as you go instead of relying on a prepared playlist.
Use wavs if you can, they will sound better on all but the most basic of sound systems.