"Danny Boy" is a nice public domain tune that can be played in any style. Ballad, slow swing, up-tempo latin jazz, whatever you feel like. The chart below has some alternate changes in certain sections.
I did a quick solo piano recording, sort of a medium swing tempo, so you can get an idea of what it sounds like. Enjoy!
If I'm not back in 24 hours, call the president.
Scot is available for skype jazz piano lessons (and google hangouts, phone call, etc...)
Use the contact link at the top of the page.