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waiting on a table; serving (at dinner)
waiter; waitress; waitperson; server; cabin boy; bellboy; page; pageboy
office boy; office girl
客に給仕をして回りました。
I went around serving the guests.
料理を給仕するのが役目です。
It's my duty to serve the food.
若い頃に給仕としての経験を積みました。
In my youth, I gained experience as an office boy.