Junior Prom (1946) - Final Dance Scene 

A 1080p, HD version of the Junior Prom Lindy clip.
Featuring Dean Collins dancing with Elsie Parrish, Helen "Mousie" Albright, Alice "Scotty" Scott, and actress Judy Clark, in that order.
It's followed by a routine with various SoCal swing dancers including: Freda Angela Whyckoff, Gil Hernandez, Hal & Betty Takier, Johnny & Venna Archer, Lenny Smith, Lou Southern, and Maxie Dorf.