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Hamburger University is a training facility of McDonald's, located in the West Loop of Chicago, Illinois. This corporate university was designed to instruct personnel employed by McDonald's in the various aspects of restaurant management. More than 80,000 restaurant managers, mid-managers and owner-operators have graduated from the university.

Oak Brook is a village in DuPage County with a small portion in Cook County in Illinois. The population was 7,883 at the 2010 census. This suburb of Chicago has the headquarters of several companies and organizations including Ace Hardware, Blistex, Federal Signal, CenterPoint Properties, Sanford L.P., TreeHouse Foods, and Lions Clubs International.

Butler National Golf Club is a private golf club located in Oak Brook, Illinois.

Butler School is a historic building in Oak Brook, Illinois. Frank Osgood Butler donated the land for the two-room schoolhouse in the late 1910s. The building became a meeting place for locals, and hosted the first club to use the term "Oak Brook" to refer to the surrounding settlement. The former school was briefly used as the village hall, police station, and library, until new buildings were constructed for those purposes in the 1970s.