Watch the Get Along Home: Key of C online guitar lesson by Marcy Marxer from Swingin' Rhythm Handbook
Get Along Home Cindy, Cindy in the key of C uses C6, G7 and F chords. I threw a C7 in as a transition from the A part of the tune(or the first half) to the B part of the tune.
At this point you can play any 3 chord song in every key on the guitar. Take your favorite 3 chord songs out for a spin and see if they work with a swing feel.