If I ran a café, one of my key hiring criteria for staff would be that they have to be passionate about music. It doesn't matter what kind of music: whether it's hip hop, krautrock, country and western or whatever. As long as they care enough to bring in things that have inspired someone, rather than falling in the valley of the undead at the statistical average of public taste, and dig up the good things that don't end up getting played otherwise. Part of the job description would involve bringing in CDs to put on.
(Of course, they'd have to be able to make a decent cup of coffee, but that can be learned.)