Sounds like you guys are a bit to the left of center with your responses.
He said "Im thinking of playing and performing using my Psr2100 for the old folks homes..."
If you're playing retirement centers, nursing homes, assisted living centers and the like you better be able to sing. Many of these folks are at the end stages of life and the only thing that keeps them going and makes a crappy day tolerable is someone playing music and singing. Additionally, if you're singing, they often sing along with you. If you're just doing instrumentals and not interacting with the audience by doing vocals and talking with them, they'll soon let the folks that do the hiring of entertainment that they're not happy about the situation. Sure, you can get away with pure instrumentals while playing the nite-club/restaurant scene, but that's a different scenario than he was describing. Stick with the vocals and practice, practice, practice.
Cheers,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)