Shopping Malls around America are closing because people's shopping habits have changed. Convert Old Malls that are abandoned to Virtual Reality playgrounds that can be 3d mapped and customizable to each virtual reality map… so the floor plan will be the same but zombies, theme or the other team can be different every game play.
Malls are fairly inexpensive. The cost per square foot on some of the malls could be as little as $1/square foot. The cost of the Virtual Reality equipment could range from $500 a headset to $3,000 depending on which VR headset is chosen.