I'm pretty sure there was a recent PBS special with old disco acts performing their hits (unless I dreamed it!). The old Rhino Records (and now Shout Factory, a new label begun by the guys who founded Rhino) did a good job of collaborating with PBS to put together concert shows of performers from the past performing their old hits. There were a few Doo Wop shows, at least one old rock'n'roll show, a '70s soul show, and, I believe, a separate disco show. As I recall the doo wop shows were produced by the Philadelphia area PBS station, but I don't recall which stations produced any of the others. In the San Francisco Bay Area, the "South Bay" PBS station seems to regularly play these concerts (and other interesting music shows), but San Francisco's KQED unfortunately seems bent on showing only old Lawrence Welk and Ed Sullivan shows.