"The audience is asked to accept the jam session in a spirit of experimentation, with the hope that the proper atmosphere will be established."
...from the program notes
It was producer John Hammond who suggested that key members of Basie's band sit in on the session.
This famous tune is by Thomas "Fats" Waller.
It starts with piano (Count Basie) and trumpet (Harry James). The first chorus goes to tenor sax (Lester Young). It's piano (Basie) and drums (Gene Krupa) next. There is a chorus on trumpet (Buck Clayton) and then alto sax (Johnny Hodges). The Basie rhythm section takes point with bass (300 pound Walter Page) conversing with piano (Basie). Goodman takes his choruses on clarinet and then Harry James on trumpet. James and Goodman lead the way out.