Milwaukee CC is very good, but if you're just looking for a very good public golf course then I have a few suggestions;
1) Brown Deer, good old-school PGA tour quality golf course, and I think durring prime time it's only $75.
2) Thunderhawk GC, a RTJ Jr. design in Beach Park, IL just over the border from WI. The best RTJ design I've played.
3) Can't go wrong with Kohler.
**Milwaukee has some great public city-owned courses, including Brown Deer.