between male and female students more difficult. Sleeping hours may be enforced by cutting electricity at a given time, for instance at midnight. Chinese students from Hong Kong, Macau and Taiwan live separately in their own dorms, as do foreigners. Mainlanders who are fluent in English or any foreign language may live in the foreigner- Hong Kong/Macau/Taiwan dorms, assuming they will be a roommate and participate in the foreign student activities, in order to help people get accustomed to mainland Chinese life. The quality of these dorms is usually better than that of mainland student dorms, with rooms either shared between only two people or completely private for a single student. Sexual decency attitudes are laxer than in mainlander dorms, with males and females sharing the same buildings and sometimes corridors (though not rooms). Students are allowed to bring visitors – including mainlanders – of the opposite sex to their rooms. Guests may or may not be allowed to stay overnight, depending on the rules of the dorm. Electricity is usually available at all hours of the day. Most dormitories for foreigners are run by the Foreign Students' Education Office (a department providing support services to students in China). They may be on campus or off campus. They are usually low cost and serve students. Notable halls and complexes Michigan State University, Ohio University, the University of Wisconsin–Milwaukee, the University of Texas at Austin, the University of Copenhagen, and London are six diverse and relevant examples of notable residential campuses that each display different relevances to contemporary dormitories in higher education. Michigan State has the largest hall; Ohio possesses four residential greens built into the campus; Wisconsin-Milwaukee has four notable tower constructions to house students; Texas maintains a residence hall with several high-tech amenities; Copenhagen has one of the world's oldest residence halls; and London possesses one of the largest metropolitan living quarters for university students. Rutgers University in New Brunswick, New Jersey has the largest residence hall system in the United States. 16,429 students live within a myriad of housing options, including apartments, suites and graduate housing. Freshmen are guaranteed on-campus housing to live on the 39,950+ student campus for at least their first year. Watterson Towers at Illinois State University are among the tallest residence halls in the world. The 28-story complex, which was built in 1967 holds over 2,200 students and its buildings are 91 meters tall.