Robots had taken over stage acting; stages had power connections that the robots would brush against during the play to recharge their batteries. In small towns they couldn't afford to have all robots, so they would sometimes mix in live actors. This was risky: the live actors had to avoid the recharge points or they'd get electrocuted. The story was from the perspective of one of those live actors. For some reason, the prop gun had been replace with a real one; he knew that, and counted on the other live actor recognizing it and not shooting him. Unfortunately, she decided partway through the show that she wouldn't continue in the play, and when the climactic scene came up he saw her brush against the recharge point and realized she was a robot. She shot him.
I don't remember exactly when I read this; it was at least 30 years ago, maybe even 50. Don't know where it was, except that it wasn't online. <g>