A Japanese-style resort hotel at a natural hot spring, offering on-site bathing.
A (Japanese) hot spring.
A public sauna.
A very hot place or room.
A room or a house designed for heat sessions.
The act of using a sauna.
In some countries, a business with bath-like facilities that is actually a brothel or a place for (non-commercial) sexual encounters; a bathhouse.
To use a sauna.