One of my sisters actually made a better living as a lounge singer than a teacher when she was living in Tokyo.
is your sister pretty and has a very nice voice though?
who would hire a lounge-drummer? just the thought makes me
but still, you're right, there are always opportunities to be had when it comes to music, the thing is that there are so many talented musicians out there that the competition is tough and actually getting a steady paying gig is pretty rare for most musicians... many wait for it their whole lives and it never comes.
music is a beautiful thing, playing instruments well actually makes you smarter; but making good bucks out of it, not so common.