You’d think that if you booked the legendary Grand Wizard Theodore to play your club, you’d let the press know more than 10 hours in advance, but whatevs. GWT—the man widely credited with inventing turntable scratching (Kool Herc was already DJing parties and isolating breaks, but he wasn’t cutting the record back and forth on the needle back then)—will be at XV, 15 SW 2nd, tonight, and it’s totally free. Feel free to do a little pre-show homework here.