Off season, I really don't think it's a problem at all for the restaurant. High season, maybe? If the restaurant is totally full, maybe, but again, you'll be out more quickly. I wouldn't do it for just coffee, as they have to re-set the table afterward, but coffee and dessert, why not? We almost always travel in low season anyway, but we have often had our meal in Grand Case in one restaurant and gone to another for dessert. And we often have preceded the whole thing by drinks at Calmos, with feet in the sand. Not sure I would bother to do an app one place, then main one place and dessert in a third place. I personally don't think it's worth the trouble to eat at two different places at somewhere OTHER than Grand Case, if you have to get in your car and drive somewhere else. But that's just me.