Le 139 is a men's sauna on the Rue des Français in Ans, the municipality on the northwestern edge of Liège, and it is quick to reach from the centre.
Inside there is a sauna, an infrared cabin, individual cabins, a labyrinth, a dark room and glory holes. It is a small place and describes itself as a relaxation space for men rather than a bathhouse on the larger scale.
Alongside its gay days it runs libertine nights and evenings for trans women and single men, so which room it is depends on when you go.