Today I was at a concert in one of those alternative concert locations. Most of these kinds of locations seem to care about D.I.Y. and anti corporatism. None the less they use Facebook to promote concerts - some concert organizers even as their main web site.
Maybe we should design posters for the fediverse and Hubzilla and hang them in these places, letting the people know that this is the online D.I.Y equivalent of what they do there in the physical world.