Stage Door Canteen Celebrates First Birthday

The video describes a canteen where servicemen's uniforms serve as entry tickets. It hosts soldiers, sailors, and marines from the United Nations for celebrations. Theaters host birthday parties with movie stars like Rachel Crothers and Roland Young. New York City Mayor LaGuardia makes remarks. The canteen, sponsored by the American Theatre Wing, offers free food and drinks. Entertainment includes Sammy Kaye's band and jitterbug lessons, with the army and US sailors participating.

What was the significance of the Serviceman's uniform at the canteen?

How did Sammy Kaye's band contribute to the atmosphere at the canteen?