All real and personal property, excepting motor vehicles, owned by incorporated or unincorporated little theatres which promote the dramatic arts and are created as or for a literary institution, a civic improvement society, or for fraternal and benevolent purposes, shall be and the same is hereby exempt from ad valorem taxation, both state, county and municipal; provided, however, that this section shall not apply to such little theatre organizations which are operated as profit-making institutions or organizations.