My buddy Chris has a song called "Everyone's a DJ," and bygod if that doesn't seem like gospel truth these days, doesn't it? DJ MU$A evidently subscribes to this sentiment -- or at least he's willing to give folks a shot to prove that notion otherwise. Last Thursday, he kicked off a new weekly at the Coral Room in the highlands on 32nd and Lowell and has subsequently extended an invitation to all DJs (and would-be DJs) to spin tunes with him from 9 to 10:30 p.m. So what do you say? Ready to mix things up? Go ahead then. Get you're groove on.