In Germany they call black music 'Black Music'.
I.e. a club will advertise that it plays 'Techno, House, Black Music', for example.
They can call it Black Music in germany cos there aren't many black people there. I went to the weirdest ragga/dancehall night in leipzig a few months ago, lots of white germans with dreadlocks talking in patois. if they tried it in most parts of london they would've got laughed at/threatened/who knows?
but there was no harm in it really.
in what way are techno and house not black music?
that's another whole can of worms...
i suppose the answer to the original question is "street" means whatever the person using it wants it to mean, you better ask them when they say it... and really if you divide music up into little chunks based on things that aren't directly to do with how it sounds, you're onto a loser as far as communicating anything useful goes.