You’ll see it on almost every menu in the city, but what’s Friday Fish Fry all about? Milwaukee was founded by predominantly Catholic European immigrants, so it’s no surprise that fish on Friday became a citywide offering year round. It’s still a tradition many families keep today! A classic fish fry includes a few pieces of fried fish (probably cod or perch) with a side of fries, coleslaw and rye bread. For an upgrade, try subbing in potato pancakes for fries.