As used in this chapter, the following terms shall have the meanings indicated:
Enterprises of all kinds, whether for profit, nonprofit, charitable or otherwise, and shall include but not be limited to manufacturing, fabricating, warehousing, selling and distributing goods, materials, equipment and supplies and rendering of services of every nature and kind whatsoever; provided, however, that it shall not include enterprises conducted by any organized church having a place of worship in the City which are intended to further its religious purpose or purposes and in addition it shall not include any enterprises of a casual or part-time nature conducted by minors.
Any natural person, partnership, association, firm or corporation.