Welcome to On the Radar, where we preview upcoming events to mark your calendars for. This weekend, it’s time to dust off your dancing shoes and grab the shiny spandex and leg warmers. Wait, it’s 2010 and people don’t dance in shiny spandex and leg warmers anymore? Okay. Then grab your preferred dance gear because Red Diamond Productions & Hallucination Recordings presents Soul Food, an event that combines music, food, fashion, art … and 12 hours of dancing. More than 30 DJs sound off, with Boston’s Soul Clap (pictured) as the featured act. Chefs Justin Sills, Shannon Talty and Rene Alfaro provide gourmet BBQ and finger foods (if you chow down, remember to wait 30 minutes before busting moves on the dance floor); several artists showcase their skills with live demos; and