The swinging doors mean that it is a cantina.
El Manatial on Calle de la Barranca is an old cantina that has been beautifully redone inside and is now a restaurant. In former times women never went into cantinas. There was no reason, therefore, for separate men's restrooms. Rather, urinals were installed on the walls in the main bar area, a convenient arrangement for the patrons. The old urinal is still on the wall inside El Manantial right behind the bar in the main dining area.