My friend and I have heard that the Fairmont Hotel has some poltergeist activity and we were wondering if it is spookier during the day or at night?

My friend and I have heard that the Fairmont Hotel has some poltergeist activity and we were wondering if it is spookier during the day or at night?
what’s the scientific basis behinds these two supernatural afflictions? if you are not from a science background then what is your take on these two phenomenom.
One thats scientific not psychic or religious.
With some level of credibility like Mufon.
My roommate claims that he moved out of his last dorm because he watched his gym bag fly across the room and that his room was haunted. Now he could be lying. But if he isn’t, is there a scientific explanation?
Im bored and I am just starting a little topic about things. Anything and everything that involves Ghosts. Or maybe even other things, Aliens you think you seen, weird dreams, anything that is just plain creepy. Thanks!
does anyone know that a poltergeist can’t survive w/out electricity?