Help me understand what I am missing here. The majority of my friends use Spotify, which already has a "share" feature to drop a song I want them to check out to the FB Messenger app for example.
If that's the case for you, I don't think you'll get much utility out of Beatnik. It's intended for people whose friends don't all use the same service. Mobile support is also not quite at the place I'd like it to be, but it's definitely on the roadmap!