I agree that a keyboard player in particular can be pretty boring to watch when playing along with sequenced music, but for the gigs I was doing, I was not the focus - I was only background music for things like wedding receptions and such. I was NOT about to sport a mini skirt, either.
I actually got lots of compliments for sounding so full, plus i also mixed it up, by playing acoustic or electric guitar on some tunes, and I also sang, in addition, I was doing a pretty wide range of music, from Beatles and Carpenters through Genesis, Gentle Giant, and Yes. Any prog fans present at these functions invariably flipped out that someone at a wedding reception might be jamming on Jeff Beck, Steely Dan, Genesis, or ELP.
I usually left myself fun parts to play, and because of the material selected, those parts generally sounded good and were of enough substance to where the whole thing didn't come off as cheesy.
Bob Bone