Variety is the "Spice Of Life", even in the nursing homes, retirement communities, etc.. The same holds true in the nightclub circuit. Play the same stuff, week after week, month after month, and even clients with their gray matter somewhat scrambled will be bored to tears.
I created several Music Finder Directories for the PSR-3000 for the NH circuit. And, these are edited frequently using Michael Bedesem's Music Finder View program, which allows the insertion of new songs and the deletion of ones you no longer use. Granted, there are a few that are old standbys that keeps these places rocking, but throwing in some 60s, 70s and even 80s stuff add a lot to the performance.
As for the lip-synch guy, he wouldn't last five minutes in this part of the world. The ADs would send him packin' for some bar room gig in Billy Bob land.
------------------ Travlin' Easy