I'm not an expert in this genre but I would go for a picture in the shade. No shadows under noses or chins to manage, no squinting.
So if you have the front of the building which is in the shade during business hour and is high enough to project a shade to cover the entire scene, I would use that. If there is no adequate place without direct sun illumination I would look for an inner courtyard to get the shade.

EDIT did not notice there was a page 2 and the shade thing had already been widely suggested.