The Congress Theater in Chicago is described as a potentially haunted venue due to its history of paranormal activity, including unexplained noises, spectral sightings, and feelings of unease reported by staff and visitors. The theater is associated with its historical connection to the Congress Plaza Hotel, a location known for being home to a variety of spirits. Reports include loud thuds and other unexplained noises emanating from the theater's basement and main stage areas. Visitors and investigators have reported seeing shadowy figures, including a man walking through a glass window and a female silhouette. Some accounts mention hearing voices, such as a disembodied response of "No" to a question in the basement. Some people have reported feeling their bed covers being tugged or pushed, or objects moving on their own.