This is 22nd film of the Bowery Boys aka: Dead End Kids film (1946-1956.) The plot involves Slip, Sach and the gang trying to expose a phony clairvoyant. They try to hold a seance in the backroom of Louie's shop, later, Huntz and Bill go to a United Mediums of greater New York seance.
that night, Margo the Medium trys to summons the spirit of Leonardi. While the performance is going on, a real nice 17th Century ghost,
Edgar Smith, appears and helps them put an end to the quack.
There is no dancing in this film. The film your looking for with swing dance is " Ghost Catchers"