Au quartier belge

The other day, at La Promenade Café, I noticed that the sign 'La Toilette' had appeared on the restroom door. I emailed the owner, to say that perhaps it should read 'Les Toilettes,' as it would in France. He replied that, in Belgium, a restroom is singular, not plural. This can mean only that the street scene portrayed on the café walls is not French, but Belgian! I remember that a French professor, in my university days, told me that I had a Belgian accent. To this day, I don't know what a Belgian accent sounds like. Like me, evidently.