The Black Spot was a nightclub whose customer base was mostly black soldiers from the nearby Army base. It was burned down by the Maine Legion of White Decency. One of the people inside was a young Dick Hallorann, who worked in the club's kitchen. However, Hallorann managed to flee to safety.
The Black Spot and its grim history were briefly alluded to in the film adaptation, It.
In It 2017 film, the black spot was burned down by a cult in 1962.
It also connected to the house in neibolt street by the sewers.