The areas where the immigrants settled were called ethnic neighborhoods. People of the same ethnic background generally lived in the same areas. Tenements were buildings made for one family that were remodeled to house six or more families. They were not sanitary:
African Americans were only allowed to do small jobs like small service businesses, shoe repair, and catering. African Americans lived in run down areas called ghettoes, parts of a city where people of a certain ethnicity or color are forced to live. The 15th century ghettoes were invented in Europe when Jewish people were forced to live in ghettoes.
The differing perspectives of Historians: Irish workers were considered inferior and ignorant. Many places hired Irish workers because the work was dangerous and high risk. When the Irish demanded higher wages and less hours, they were fired and replaced with Chinese. The American businessmen did not respect the Irish.