Now this is a whole nother thang, the 'audience outside, band inside' nonsense.
Even in my short (10-year) gigging life, I've encountered this more times than I'd have believed possible.
Having played to an empty room, you get a constant stream of punters on their way to the Gents as you're breaking down, and they all say how great you were, and you think, "well where the f*** were you while we were playing, mate?".
This pic was taken over five years ago, where the entire audience (in the pub) comprised a Border Collie.
Meanwhile there were 50 people in the car park enjoying the unseasonal heatwave in October.