Smile. Or at Least Open Your Mouth When You Speak

I have always wondered why people who are not socially engaged, or otherwise pleasant in public, work in customer service jobs. Serving people may not always be fun, but if you are the checkout person, you are the last person I see before I leave the store. Ok, so you don’t have to happy and light-hearted about everything, but at least talk so I can understand you. I’m curious about both sides of this equation. Are stores this strapped for employees that they really hire anyone with a pulse to run a register? And if you don’t like talking to people, why subject yourself to this environment?