Jam to "Blue Bossa"
Blue Bossa is one of the more popular jam session tunes. It is a very simple song form, so it is relatively easy to learn. It is 32 bars, ABAB. Usually when we say "ABAB" we mean that the A sections are similar or identical, and the B sections are "close enough." But in this case, they are identical -- identical melody and identical chords. So if you learn the first 16 bars, just play them twice and you know the whole song.
Harmonically, Blue Bossa is not terribly complicated. Much of it is in C minor concert, so practice that C dorian scale.