The intersection of 7th Street, Florida Avenue, and U Street Northwest perpetually echoes the “boom-tap, a-boom-boom tap” sound made famous by the late Godfather of go-go, Chuck Brown. Minor Threat front man and D.C. native Ian MacKaye can still be heard playing all ages shows throughout the city, making tickets available exclusively at local record shops. And, if you get creative, you can scour the side streets of D.C. and find some of the rare remaining tags of the elusive Cool “Disco” Dan. D.C. underground will be sanctified this weekend in a 3-day lambast of cool marking the opening of “Pump Me Up: D.C. Subculture of the 1980’s” and the world premiere of the film “The Legend of Cool “Disco” Dan”.