Jam band
Music genre
A jam band is a musical group whose concerts and live albums substantially feature improvisational "jamming." Typically, jam bands will play variations of pre-existing songs, extending them to improvise over chord patterns or rhythmic grooves. Wikipedia
Parent genres: Rock, Bluegrass, Psychedelic rock, and more
Cultural origins: 1960s, California, United States
Derivative forms: Progressive bluegrass; Livetronica
Stylistic origins: Jazz; folk; country; psychedelic rock; progressive rock; jazz fusion; blues rock; southern rock; funk (later instances)
Artists
Albums