Everyone knows there is a cultural divide between France and the US - perheps many other place as well. Here is but one anecote regarding restaurant service, and maybe others can provide insight.
I was eating at Au Bon Vieux Temps in Le Grand Bornan (Haute Savoie), a super-traditional, family-run place. With the first course, a terrine maison, I was served a miniature pot of very delicious onion confit - what looked like an individual serving. When a woman came to clear the dishes, she took away the pot which still had a bit of confit left. I asked her to leave it since I wanted to eat the rest with my next course.
She looked at me suspiciously, while keeping the pot in her hand, and asked what I ordered..... I said the caillon ("le caillon, ce'st du cochon"), and she relented, "ah, d'accord," and put the pot back on the table. As if I had said somethiing else, like veal with blueberries, she might have instantly waltzed away with the confit thinking it inapproprate.
I thought that this was amusing, that I needed her consent....