At the end of Stéphane Grappelli and bands show at The Great American Music Hall, July 7, 1982, they were joined by David Grisman and band for Sweet Georgia Brown.
As it is pretty obvious they were really hitting it off together. They had been been playing together before, and that collaboration yielded the Stephane Grappelli/David Grisman - Live album that is, just like this show, very much recommended.