
Fred Astaire, good friend of the Gershwins, sang "A Foggy Day" in the 1937 film "A Damsel In Distress," which also featured "Nice Work If You Can Get It." Like all Gershwin tunes, it has a beautiful introductory verse (included in this key-of-Eb arrangement). The chorus has a standard 32 bar structure (a 16-bar statement, then repeat the first 8 bars of that phrase and end with a different 8 bars) - except Gershwin adds an extra two bars to the final 8-bar section - something he did in a number of tunes. Notice the 4-note phrase in the chorus (a fog-gy day) that is repeated several times over different chords. The unusual feature in the chord progression is the "flat III" chord (Gb7) which happens twice and is like an instrumental hook.