noun
room clerk (hotel); steward (ship)
Refers to staff responsible for guest rooms in hotels or passenger cabins on ships. The specific duties depend on the context.
ホテルの客室係が部屋まで案内してくれた。
The hotel room clerk showed me to my room.
船の客室係に飲み物を頼んだ。
I asked the ship's steward for a drink.