How do you say "Cafeteria Workers"? I've been trying to figure what is the best way to describe school cafeteria workers without sounded too formal or too rude (just a normal way of saying cafeteria worker) 

Would you say


  "食堂员工” “工人”？  


Or is there a less formal way to imply “worker” in this instance？
You can use 食堂师傅 as an informal way to refer to those cafeteria workers. Actually, you can use 师傅 every time you want to refer to someone with a skill, e.g.修车师傅(bike/car reparation worker). But here 师傅 has nothing to do with Master Shifu in Kungfu Panda. It is not like that Shifu :D