I feel you. Facebook virtually grants a certificate of existence. It's almost unimaginable why someone that wants to play music wouldn't have a facebook presence. (Don't know if that last sentence was correct, non native here).

My point is the following: I was one day on the street and saw a flyer glued onto a wall, it looked kinda funky and hand-drawn, interesting; some DJ's were going to throw a party and spin salsa, funk, latin jazz, cumbia... And I didn't recognize any of the names or the venues, I was mildly shocked because I believed I knew the local scene pretty well.

Almost always I can contextualize a music genre/scene, and see their connections and collaborations. But this random flyer I came across was so obscure! No relations, no known names, and the mix of styles and originality was very interesting! For the first time in many years I felt again what is like to find an underground scene, which I like a lot (like when dancing drum&bass in a basement in Berlin or listening to rap in Mexico).

This is a magic that is sometimes lost in the believed omniscence and omnipresence of online/facebook. I bet people soon will want to have those kind of experience, and the new thing will be to find scenes that people don't even know about online.