https://www.theatlantic.com/business/archive/2017/02/segregation-invented/517158/

But what few people know is that the South wasn’t always so segregated. During a brief window of time between the end of the Civil War and the turn of the 20th century, black and white people lived next to each other in Southern cities, creating what the historian Tom Hanchett describes as a “salt-and-pepper” pattern. They were not integrated in a meaningful sense: Divisions existed, but “in a lot of Southern cities, segregation hadn’t been fully imposed—there were neighborhoods where blacks and whites were living nearby,” said Eric Foner, a Columbia historian and expert on Reconstruction. Walk around in the Atlanta or the Charlotte of the late 1800s, and you might see black people in restaurants, hotels, the theater, Foner said. Two decades later, such things were not allowed.