For the purposes of applying the requirements in Sections 1165.01
and 1165.02
"floor area," in the case of offices, merchandising or service types of uses, means the gross floor areas used or intended to be used by tenants, or for service to the public as customers, patrons, clients or patients, including areas occupied by fixtures and equipment used for display or sales of merchandise. It shall not include areas used principally for nonpublic purposes, such as storage, incidental repair, processing or packaging of merchandise, for show windows, for offices incidental to the management or maintenance of stores or buildings, for toilet or rest rooms, utilities, dressing rooms or fitting or alteration rooms.