The Future of Music Promotion is Hyperlocal

 The best influencers and opinion leaders for indie music are your local webcasters, podcasters, college radio stations and music/art/entertainment bloggers.  They're far more accessible than commercial broadcasters, and in the aggregate they reach more of the audience that's in closest proximity to you and do so with greater frequency than traditional FM stations, social media, or the music recommendation services; e.g., Spotify.  In the DMV, stations like WOOK can provide local artists in depth coverage and are open to creating partnerships and other ventures.