The RIAA party enjoyed a little unexpected excitement last night: Bumping against the 9:30 Club stage to the sound of ’90s pop rock, Hill staffer David Quinalty never imagined a bouncer would pick him for an open mic rap-off with Sugar Ray lead singer Mark McGrath. [Sugar who?] From what …

Let the rap battle begin.

We don’t mean to be cocky, but on Friday web guru Michael Turk challenged FamousDC to a Twitter rap battle and it wasn’t pretty.  We had pretty much cleaned his clock by round four. @MichaelTurk – Attention! – we need a clean-up on aisle 3, Turk was spilled everywhere by …