A sideman is a professional musician who is hired to perform or record with a group of which he or she
is not a regular member. They often tour with solo acts as well as bands and jazz ensembles.[1] Sidemen are generally required
to be adaptable to many different styles of music, and so able to fit smoothly into the group in which they are currently playing.
[2] Often aspiring musicians start out as sidemen, and then move on to develop their own sound, a name, and fans of their own, or
go on to form their own groups. Wikipedia


