hotel Le sube in st trop has a fab location in st trop, right on the front.
Anyways, lunch far more important .... the Z bar at the Martinez is nice for lunch on the front in Cannes, and if in St trop for an evening ask anyone for directions to Chez Les Garcons just behind the main front and have the Oeufs Cocottes. Mmmm oeufs cocottes....