Call Me The Breeze (JJ Cale) - key of F# - listen to JJ Cale's original version; also check out versions by Eric Clapton and John Mayer
Born Under A Bad Sign - key of G - Cream version - also check out Hendrix's version on his album "Blues", it's a nice extended jam without lyrics
Red House (Hendrix) - key of A (although Hendrix versions are in Bb since he tuned down) - I like the version on the album "Fire: The Jimi Hendrix Collection"
Key To The Highway - key of A - Clapton/Derek and the Dominos versions
Sweet Home Chicago - key of E - listen to Clapton's version on Sessions For Robert Johnson
We could also try a freeform jam based on Santana's Oye Como Va - key of A