Wanna gig? Perhaps you just need to call the right symphony orchestra or opera company:

He said: “I thought it would be nice to be in the audience for a change so I called up to buy a ticket. The man who answered the phone knew me vaguely and asked, ‘You’re a tenor, aren’t you? I don’t suppose you are free tonight? Our tenor is ill’.”

I read it here. It’s true that the person answering would need to recognize your name, so maybe you want to send some publicity info ahead of time. And don’t go getting singers or instrumentalists sick just to get the gig. I think that’s a fairly bad idea.

Just sayin’.