Dutch side usually adds on 15%
If not add a tip.

French side only give a little extra than the total bill
if you feel the service was worth more. 5% to 10%.

I wish I knew this before all the 20% we added to dinners in Grand Case (and Italy). <img src="http://www.traveltalkonline.com/forums/images/graemlins/Laugh.gif" alt="" /> <img src="http://www.traveltalkonline.com/forums/images/graemlins/duh.gif" alt="" />