Agree.. so you can almost pick any songs from wherever u hear it
and then improvise it the blues way..or play it like a blues song..
in a way the way you play the song gives it a special meaning even
though you are not the one who first wrote the song.. but of course
this is for leisure purpose..
Slow the beat, in a way, jazz sometimes is also about
improvisation.. but more of vocals.. blues is more instrumental..
guitars, harmonicas, piano (quite rare cos blues is mainly on
guitars most blues players are guitarist). Take a listen to Jimmy
Hendrix's Red House.. I think its a nice blues song.. Eric
Clapton's Wonderful tonight more contemporary and
pop-sounding..