Roller disco is a long-lost art form that still thrives in a hardcore subculture of skating dancers, mostly in the Midwest (and at San Francisco’s divine Church of 8 Wheels). But the irresistible combo of movin' and groovin' while rolling on hardwood is having a minor 21st-century revival in hipper circles, too, and a motley crew of local DJs have cobbled together a rare roller disco pop-up at Southgate Roller Rink in White Center. Pro tip: Roller-skating rewards sobriety. Don’t drink/drug and dance (if you are on wheels), though there will also be a regular ol’ dance floor if you don't want to lace up those skates. by Gregory Scruggs