You play all original material you might work in a coffee shop for tips and even then they want to see an Acoustic Guitar not an Arranger
All pros like yourself know we're in the "make people happy" business and that means give them what they want and make believe if you have to that there the greatest songs in the world. I'm bored with a lot fo what I have in my sets but those aongs have been proven to work over many gigs and I'm there for the audience, not me.
I would of told that lady "if i was doing all originals I wouldn't be here to play for you tonight. Think about it. "