After Chris Stein and Debby Harrie met Fab 5 Freddie in the Downtown scene they went Uptown to see the parties over there. They famously produced 'Rapture' as a tribute and used Chic's 'Good Times' as inspiration. Fab 5 Freddy famously gets a shout-out and Chris Stein went on to produce the soundtrack for Wild Style.
This show occurred a few weeks before the famous series of Clash shows at Bonds which featured rap/hip hop acts, and is likely the first rock/rap fusion ever recorded. This is an audience recording, but the quality is fairly decent.