I'm sorry, what causes you to think I do not 'get' it? I believe I included the SoundExchange delineation on the performance rights on my original post. As I stated, I simply stated I hadn't sat and read the entire PDF.
The complaint was specifically about 4,907 of 15 million recordings. I don't know what the 4,907 specific recordings were. To be honest, I don't really care.
But, if you're the same AC who implied that I played unlicensed music - I think "I don't know" is a more accurate answer than your conclusion.
Many DJs do not carry physical media with them anymore, aside from what music files are on the hard drive. There are a multitude of music services that tailor specifically to DJs, which falls into the "digital streaming" category. It's one of the niceties of being in the 21st century. Think of a patron wanting a request ... the DJ can pay $50 a month or just buy each individual request they may get. The subscription model generally works out better for most DJs.
The Venue's ASCAP/BMI/etc license covers performance rights. The Grooveshark legal complaint covers digital distribution/streaming.