Except that so many people have asked this question, I would think it’s a joke.
Ghost hunting is a terrible idea for a date, unless both of you are experienced paranormal investigators
Ghost hunting requires your full and focused attention. On dates, you are (or should be) at least somewhat distracted by your companion.
So, plan a date that’s a real date. Go somewhere fun. Choose a place where you can have your attention on each other, and not be in any danger. (Face it, ghost hunting can be dangerous.)
If you’re not enjoying time with your date, be tactful. Nobody wants to hear “you’re not that interesting” or “I thought this would be more fun.”
If you’re thinking about ghost hunting when you’re with your date, apologize. (Even if you think your date disappointed you.)
Conclude the evening, and call a few teammates for ghost hunting. That way, the night isn’t a total loss.