My first job was checkout at a local, popular grocery store. All the locals went there (not a chain). I was SCARED to say the least. But this was where my daily talking began to grow my confidence. I worked with another stutterer. We worked hard and the stutter was barely an issue. Since your interactions with people will be quick, most customers won't notice a pattern to your speech. So, you have no reason to feel embarrassed! You get to choose your reaction.