HAHAHA, I was almost in a band with a guy that played an old keytar!
But the whole thing was a joke:
Guitarist/singer thought he was playing drums. all he has is like a couple bongo drums or something
Singer guy has controlling wife who he obeys, which means everyother sunday we could practice, the other sundays are family days and every one had very different schedules
One person played the keytar
With the possible exception of me, he was the most knowledgable musicain in the would be band.
The singer/guitarist was no good
If I only lived further north I could be in a talented cover band. All older folks (I'm only 20, so it ain't hard) who sadly were surprised to see a bassist that played an A when they said A

But I just don't have the time, not that far away
I'm done now...Wait

Keytars, they are funny. Kinda cool in a way, but I think they are more funny. Though it would all depend on style of how it is used.