Virginia DJ-producer duo All Good Funk Alliance will grace the fourth-anniversary session of Nitty Gritty, one of the city's longest-running dance nights. Partners in party mixes since 1995, Frank Cueto and Rusty Belicekshake down the walls between dance, hip-hop, and world music, smoothing over the wreckage with funk, breaks, and Latin grooves. Their remix résumé includes Fort Knox 5, Dublex Inc., and Swamburger. Their label, Funk Weapons, is a remix factory. Be ready to sweat.