field house
noun/ˈfiːld haʊs/
/ˈfiːld haʊs/
(North American English)- a building at a sports field where people can change their clothes, have a shower, etc.
（有更衣室、淋浴间等的）运动场附属设施楼 - a building where sports events are held, with seats for people to watch
（比赛用）室内运动场，体育馆