Within its brisk 78 minutes, Jam Session manages to accommodate the singing, dancing and acting talents of Ann Miller, a romantic main plot, a comic subplot-and no fewer than six big-name orchestras. The story is the old saw about a small-town girl named Terry Baxter (Miller), who wins a trip to Hollywood. Unable to impress any of the tinseltown bigwigs, Terry is about to pack it in and head home until she meets go-getting screenwriter George Carter Haven (Jess Barker). Several mishaps and setbacks later, Terry not only lands a studio contract, but Haven as well. In addition to the terpsichorean talents of Ann Miller, the film spotlights such major big-band names as Charlie Barnet (playing "Cherokee," of course!), Louis Armstrong, Alvino Ray, Jan Garber, Glen Gray and Teddy Powell, along with vocalists Nan Wynn and the Pied Pipers. A tantalizingly brief clip of Jam Session was featured (wildly out of context!) in the 1968 Monkees film vehicle Head.
~ Hal Erickson, All Movie Guide