France, with a food culture second to none in the West (including the Americas), has long since solved the "problem" at eateries (I'm not sure about its globally branded US Fast Food outlets) by legislating that all menus, bills, checks and the ilke must state clearly that a fixed 15% service charge and tax (%?) are included in the individual menu items or wine list bins. As general rule, the French do not leave an additional pourboire unless there has been some special service or food experience beyond expectations.