Joe Henderson in 1978 may not have enjoyed the widespread popularity he later achieved, but I believe he was in excellent form as a player. Also, Joanne Brackeen was at her peak.
Personally, when I think of Steve Rodby, I recall him playing electric bass on Pat Metheny's best albums. However, it seems he originally played acoustic bass. I've heard a live recording of Joe Henderson in France from around the same time (November 1978), and Rufus Reid was on bass for that session (same pianist and drummer). Since Rodby was the house bassist at the Jazz Showcase, he might have been filling in for Reid. Danny Spencer wasn't particularly distinctive, but he was a competent drummer.