Sundown towns, also known as sunset towns, gray towns, or sundowner towns, are all-white municipalities or neighborhoods in the United States that practice a form of racial segregation by excluding non-whites via some combination of discriminatory local laws, intimidation or violence. 29 sept. 2021 · Sep 29, 2021 From Maine to California, thousands of communities across the United States historically practiced - and in some cases, still practice - a form of racial segregation by excluding racial or ethnic groups through some combination of discriminatory local laws, intimidation, or violence.