Principally permitted uses in the C-O Commercial Office District shall be as follows:
(a) Single family detached dwellings;
(b) Offices for real estate, insurance, accounting, medical, financial, administrative, travel and related services;
(c) Small-scale retail uses such as gift shops, hobby stores, books, jewelry, antiques and apparel;
(d) Personal services such as barber or beauty shops, dance or music studios, artist or photographic studios or galleries, shoe repair shops and tailors or dressmakers;
(e) Uses which are comparable in character to the above and in accordance with the purposes of the C-O District and the provisions of Section 1280.01(b).