There are two aspects to what olddude is doing. sure, he's playing music for them.

But he's also offering personal, live attention, and people today (especially the young) are not getting enough of that. They get a lot of simulated electronic attention (IM, texts, e-mail, Facebook, twitter) but that isn't as good as true personal interaction.
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"Any adult who will TALK to them!" (an exclamation from a friend of mine who is high up in an upscale school system)

"Children today spell 'love' T-I-M-E." (from a psychologist in the newspaper.)