Not originally considered a jazz tune, much less a standard, “Summertime” only became commercially successful in the early 1940s with the revival of *Porgy and Bess* – a decade after it was written. Covered by just about everyone, it’s a must know. The great thing about this standard is you can play it in any style – swing, salsa, reggae, or funk – featured here. It’s also a perfect tune to lock down in all 12 keys.