On any lot running through from one street to another, the front of the lot, for the purposes of this section, shall be considered the frontage upon which the majority of the buildings in the same block front. Regardless, the front yard setback shall be required from both street frontages.

The minimum lot frontage (as distinguished from lot width) may equal, but shall be no less than 2/3 of the required lot width as set forth in the schedule contained in Section 16-8 and further provided that no lot shall have a frontage of less than 65 feet. This provision shall apply to all lots, including those fronting upon the turn-around of a cul-de-sac or upon a street having a curved alignment with an outside radius of less than 500 feet.