Are You Havin' Any Fun? 1939-40 Edition, Lyrics by Jack Yellen, Music by Sammy Fain, Crawford Music, New York, 1940.
 
Sheet Music - Standard Size
Vintage from the 1940s
 
It featured in the Broadway review series George White's Scandals in 1939.

Sunned spine & owner name/address front top with heavy corner & surface creases/ripple. About 12 x 9 with 5 pages.