men's dormitory; boys' dormitory
Refers to a dormitory specifically for male students or workers. Often used in contrast with 女子寮 (women's dormitory).
The university men's dormitory is close to the station.
He lived in a boys' dormitory during high school.
Compound of 男子 (だんし, 'male, men') and 寮 (りょう, 'dormitory'). The reading is straightforward and the meaning is transparent.