Any sort of fire-related issue is obviously one of the worst nightmares for the owner of any kind of business. For escape rooms, where people are locked in narrow space is an industry standard, even the minor incident can lead to serious consequences if not accounted for. You can set the sprinklers and fire extinguishers during the construction, but super-narrow passages, not enough fire exits per square feet, fire exits blocked beyond fixing (I've once seen "fire exit" leading to balcony, where you can only jump from - third floor) - any of these is an immediate hard pass.