This tune is a jam session favorite because most people know it, it has a simple song form, simple melody, and predictable chords. This song is full of ii-V patterns -- bars 2, 4, 7, 12, 13, 15, and so on. The nice thing about ii-V and ii - V - I patterns is that you can treat that entire sequence as if it was a single chord. The ii, V, and I are all based on the same scale.
This arrangement is a little different, with a reggae feel at a very laid-back tempo. Get yourself into "Island time" and don't try to play too many notes.