Great idea.
I've currently got a "busking setlist" that I work off:
Dead Flowers - Rolling Stones
Dirty Old Town - Pogues
Downtown Train - Tom Waits
Hurt - Nine Inch Nails
Irish Heartbeat - Van Morrison
Romeo & Juliet - Dire Straits
Song To The Siren - Tim Buckley
The Harder They Come - Jimmy Cliff (as a rockabilly song)
The One I Love - REM
Play With Fire - Rolling Stones
Unchained Melody - Righteous Brothers (my own 4/4 arrangement that also hides my lack of vocals in comparison)
Will You Love Me Tomorrow - The Shirelles
Positively 4th Street - Bob Dylan
Heroes - David Bowie
Bennie & The Jets - Elton John (i'm working on this one, having trouble getting the vocals to fit)
Darlington County - Bruce Springsteen
Sweet Child O'Mine - Guns N Roses
You Shook Me All Night Long - AC/DC
Stand By Me - Ben E. King
Pretty Woman - Roy Orbison
Wicked Game - Chris Isaak