You guys may want to stick to music because your comedy needs a little work.
On the 9000, the GrOOve feature is indeed accessed through the Style Editor. It simply allows you to change the timing of the various style parts. You can create totally different styles with just few clicks.
On the 740, it is automatic. One dedicated button changes the groove. On the 8000 and 9000 it is not so simple, but the editing possibilites are much greater.
This is a much-overlooked and extremely powerful feature.
DonM