The French have a 'make-it-yourself' type of lemonade. At any cafe in France, if you order a citron pressé, a waiter will appear with a tall glass partially filled with freshly squeezed lemon juice, a shaker of sugar, a pitcher of water, and a spoon. You then make your own lemonade, adjusting the sweetness and tartness to your own individual taste. The following recipe for a single citron pressé calls for sparkling water, but you can use plain water if you like.
I don't think I ever tried a citron pressé in Paris, but as I was there in late March it wasn't lemonade season. This week will be, though (and I've heard it's hot in Paris, too, so it will be easier for us to feel like we're there).
Oh, that's good! More tart and puckery than American lemonade, even with a couple of teaspoons of sugar, and tres rafraichissant, especially with sparkling water.