Funny- I came here for the lyrics after having worked out some chords in the style of Taj Mahal. Ragtime guitar, finger picking, alternating bass strings, ideally using a slide for the melody notes. Picking ragtime while wearing and using a 4th finger slide is a cool sound, guys like Peter Rowan, or Tony Furtado, Warren Haynes, Bob Brozeman, they blow my mind! Check out Tony Furtado, BTW.
So I play this song "Nobody's Business" in the key of D. The arrangement has 4 parts, sort of an A_A_B_A, with an introduction and an ending phrase or turnaround, identical to the last A part. Am I making any sense? The three A parts start the same, but the first one ends/resolves to the five chord, A major or A7. The other two resolve to the one chord, D major. The B part is where Taj would embellish or talk to the audience before a final refrain.
1) D-G7-D-D7-A7   
2) D-G7-D-A-G-D
3) F#m-Bm-E7-A-G-A
4) D-G7-D-A-G-D
start on fret 7 D chord, fret 3 G7, adding pinky finger notes for melody