Are ghosts real? I don't know, maybe, maybe not, bu they can certainly be fun to watch in the movies.
And one of the most fun horror movies I have seen is “1408” starring John Cusack. and Samuel L. Jackson.
Cusack plays a travel writer who researches hotels and haunted houses.
Of course he has yet to find any so called ghost.
That is until he comes across the 1408 in The Dolphin, a upscale hotel in New York City.