Homeless shelters are temporary resiences for homeless people. Usually located in urban neighborhoods, they are similar to emergency shelters. The primary difference is that homeless shelters are usually open to anyone, without regard to the reason for need. Some shelters limit their clientele by gender or age. In the United States, most homeless shelters expect clients to stay elsewhere during the day, returning only to sleep, or if the shelter also provides meals, to eat; people in emergency shelters are more likely to stay all day, except for work, school, or errands. Some homeless shelters, however, are open 24 hours a day.