The Entourage Music and Theater Ensemble was an ambient music group. The group was active from 1970 to 1983 and performed in theaters in combination with dance ensembles.

The primary members were founder and director Joe Clark (2) on saxophones and keyboards; Rusti Clark on viola and guitar; Michael Smith (9) on drums and percussion; and Wall Matthews on guitars, keyboards, and percussion.

Entourage formed in Baltimore, Maryland in the early 70's, relocated to Millbrook, New York, then moved to New London, Connecticut in the mid-seventies and finally re-settled in the Baltimore, Maryland area. The group disbanded after the death of Joe Clark in 1983.
From wikipedia
Artist biography from Discogs