The Showroom Cremerie de Paris has
5 large windows that connect the inside to the buisy rue des Halles et la rue des Déchargeurs.
People that wak from the Forum des Halles / rue de la Ferronnerie / Centre Pompidou
towards the rue de Rivoli / Samaritaine / LVMH headquater and the Louvre
might come by these windows.

When the curtains are open people can see the inside of the showroom
from the street as this photo demonstrates.

Curtains exist in different colors so that the inside of the showroom
can be privatised.