FRIDAY: >> Comets on Fire bring their detailed, funky prog sound to D.C., with openers Benjy Ferree(***) and (The Sounds of) Kaleidoscope at Black Cat. I (heart) music tells us that if you love Deep Purple, you’ll like Comets on Fire. Listen to a few tracks over at Hype Machine to test the waters. $12, 9:30 p.m. >> Looking for a straight-up chance to dance? Venezuela’s Los Amigos Invisibles always deliver, with DJ Afro at…