A groovebox is similar to a Music Workstation[?] except that it doesn't have a keyboard and generally includes more user controls.
"Groovebox" type instruments include:
... Kosygin[?], Premier of the Soviet Union[?] (+ 1980) February 25 - Adelle Davis[?], nutritionist, writer (+ 1974) February 29 - Jimmy Dorsey, bandleader (+ 1957) March ...