This reggae cantina scene is pretty obvious: It's heard in the casino scene, 55 minutes into the movie. Not all of this music is heard in the film, though. My brief analysis will consider the structural (rather than narrative) functions.
0:00-0:39 Incidental orchestral music
0:39-1:23 A section, D minor
1:23-2:16 B section, g minor
2:16-2:35 Recap of A section, g minor
I love the key change from D minor to G minor. Reminds me of Sousa marches :-)
Also reminds me of “The Throne Room” from the end of A New Hope.
The Music of Star Wars
These posts will help focus and develop my analyses of John Williams' film scores.