another interesting question would be discussing jam session themes for, say, jazz, jazz piano, or bluegrass..............
when i tune into smalls late night jam sessions, there is an embarrasingly small number of jam session standards. a very few come to mind. i'll remember april, the way you look tonight, all or nothing at all, autumn leaves, if i loved you, percy faith's invitation. if i hear these tired 'standards' one more time............