Pan-fried LAKE perch [Southeast Wisconsin]
There have been lots of discussions here about fish fries in Milwaukee and southeastern Wisconsin, and the fish they use is often local lake perch. Check them out:
If you mean Milwaukee, the Milwaukee Ale House had lake perch and walleye(yum) on the menu for their Friday fry as of about March.
There is a ton of small joints outside of Milwaukee that still have locally caught awesome fish. There's a very small shed 30 minutes out of town that still has all you can eat walleye or bass for $8 with all the trimmings!