It's specific to its time, but Tom Paxton's "Talking Vietnam Potluck Blues" brings a smile (We have met the enemy and he has been smashed!)

Arlo Guthrie's "Coming into Los Angeles"

The Short Sisters' "Coffee"

Christine Lavin's "Chocolate Covered Expresso Beans"

Shel Silverstein's "Have Another Espresso"

Mississippi John Hurt's "Coffee Blues" isn't about coffee, but it's a great song.