An older black and white movie, probably from late 40’s or  50’s.. saw it on TV when I was young.. been dogging my memory forever.. the plot revolved around an advertising agency. The scene I remember most is the leading characters locking the doors to their Madison ave. office and projecting an image on the next door building.. the image was a cat dancing to cab Calloway’s “Minnie the moocher”.. I saw this movie (romantic comedy) once in the early 60’s and have never seen again..