I used to work at a movie theater, so I did like concessions, selling tickets, and ticket checker. I will say that customer service is really autopilot work, it may be a little difficult at the beginning getting the hang of having to talk a lot, but after a while you’ll just get in the zone. At least that was my experience, I did have some bad days where I couldn’t form a sentence but even then you can also just not talk (besides the usual greeting and thanks).