A public bathhouse (sento) — a bathing facility open to the public rather than a private home bath.
仕事帰りに近所の風呂屋へ寄った。
I stopped by the local bathhouse after work.
昔は銭湯（風呂屋）が地域の交流の場だった。
In the past, public baths (furoya) were community gathering places.
The proprietor or operator of a bathhouse — the person who runs a furoya.
風呂屋の主人が毎朝湯を焚いている。
The bathhouse owner heats the bathwater every morning.