Brussels
Visiting Brussels without standing in line for the perfectly double-fried french fry is unthinkable. The best friterie is hotly contested among locals, but the length of the line is directly proportional to the quality of the frites. Good bets are Maison Antoine on Place Jourdan, Friterie de la Chapel, or Place Flagey. Choose from one of the dozens of sauces ("samurai sauce"—mayonnaise with harissa—is a favorite), and enjoy them at a nearby cafe, as long as you've purchased a beverage.