As a business owner, you have a responsibility to provide a "duty of care" to the public. An individual might accuse your business of negligence if it does not meet certain "duty of care" safety standards. Here are the types of people that the business owner must be responsible for:
Invitee: A visitor to your property requested by personnel.
Licensee: An individual with permission to visit for their own purposes.
Trespasser: A visitor who lacks permission. You must still avoid wilfully physically harming the individual.