What's the simplest song(chordwise) that you play, or will play(LOL)? I play mostly older standards that have a fairly complex chord structure but I do play some rock and roll such as Day Tripper, I Heard It Through The Grapevine, etc. These are pretty easy but lend themselves to improvisation nicely.
The simplest that I play is Feelin Alright by Dave Mason and Traffic. It consists of two chords only(as far as I can tell) but is still quite satisfing to play. Any others?
Chuck