If you’re interested in the choicest cuts from DC’s local music scene, the DJs at Black Cat’s backstage tonight will be serving up an unpredictable survey of old and new homegrown tracks. In celebration of the releaseof  his warped new DC RE:Mixtape, Shock Diamond is hosting a D.C.-only DJ night. Many of the bands whose music was gutted and dancified on the mixtape will be spinning their favorite songs from the area, and guest DJs include Protect-U’s Aaron Leitko and former Black Eyes member Hugh McElroy. With genre limitations thrown to the wayside, there’s no telling what deep grooves will get pulled from the archives. There’s the obvious catalog of D.C. post-punk that made the Black Cat what it is, but plenty of jazz, hip-hop, and go-go has graced the city over the years, so you’ll have to stop by to see what rare LPs get spun.