"Business or commercial use" means the purchase, sale, offering for sale, or other transaction involving the handling or disposition of any article, service, substance, or commodity for livelihood or profit; or the management or occupancy of office buildings, offices, recreation or amusement enterprises; or the maintenance and use of buildings, offices, structures, or premises by professions and trades or persons rendering services. (Ord. 523 § 1(part), 1989)