After rocking with folks like Nas, Reflection Eternal, Damian Marley and a host of other legendary hip-hop artists at the Rock the Bells concert tonight, be sure to make a stop at Mario's Double Daughter Salotto (1632 Market Street) for the Beat Cave, an event showcasing the state's hottest hip-hop producers. Hosted by 2009 Westword Music Showcase winner F.O.E., the event features a star-studded ensemble including Red Bull Big Tune champ Boon Doc, Mass Prod of Food Chain, Flawless and High Res of the Fresh Breath Committee, Q Nox, DJ Check, SP Double, Fire Marshall Jo, Selko and the all female production crew, Elemental Project. There will also be sounds spun by DJ Unison, body art models, live painting and visuals. The event start at 9pm and costs a mere $5 to get in. Check it out and find out how Colorado hip-hop sounds.