A seance is a session where a group of people, called sitters, come together in an attempt to contact and communicate with deceased humans who are believed to be spirits and exist in a dimension outside of our physical time-space reality.
(See his ExposÃ© des motifs et projet de loi sur l'instruction primaire, presentes a la chambre des deputes, seance du 2 janvier 1833.) In the words of the Edinburgh Review (July 1833), these documents "mark an epoch in the progress of national education, and are directly conducive to results important not only to France but to Europe."
Interestingly enough, Conan Doyle himself "appeared" in photographs taken after his death and he was "contacted" on at least one occasion during a seance.
When asked about the inn's latest guest paranormal activity, Staub said, "Our re-creation of a Victorian seance was one way civilians dealt with the great loss of loved ones."
A Ouija board seance is a combination of two controversial methods for attempting to contact and communicate with spirits.