In the United States, residence halls are sometimes segregated by sex, with men living in one group of rooms, and women in another. Some dormitory complexes are single-sex with varying limits on visits by persons of each sex. For example, the University of Notre Dame in Indiana has a long history of Parietals, or mixed visiting hours. Most colleges and universities offer coeducational dorms, where either men or women reside on separate floors but in the same building or where both sexes share a floor but with individual rooms being single-sex. In the early 2000s, dorms that allowed people of opposite sexes to share a room became available in some public universities. Some colleges and university coeducational dormitories also feature coeducational bathrooms. Many newer residence halls offer single rooms as well as private bathrooms, or suite-style rooms.