The thing about working in the service industry is that customers seem to think they simply know better than you. It doesn't matter if the sky is getting dark or everyone else leaves the patio like rats scuttling from a sinking ship. There's a type of person who just can't be bothered by someone who they think is “below them.” And just such a thing happened here, to the satisfaction of this employee. For another run-in with Karen, here's the useless ex-manager who tried to get an ex employee to…