Okay so I'm genuinely asking this as a joke but also... is it possible a ghost has a schedule? Because my mate's flat in Croydon has had activity every single night except Tuesdays for the past eight months. No exceptions. Tuesday comes round, absolutely nothing, then Wednesday morning the doors are slamming again.
Either his ghost is incredibly conscientious about work-life balance or... I dunno, has a standing booking at a different haunting venue? Maybe it's moonlighting in Thornton Heath on Tuesdays?