A building or premises shall be used only for the following purposes:
   (a)   Any use permitted in the R-3 Two-Family Residence District;
   (b)   Multiple-family dwellings;
   (c)   Boarding or rooming house or tourist home;
   (d)   Private club, fraternity, sorority or lodge, except one the chief activity of which is a service customarily carried on as a business; or
   (e)   Accessory building or use customarily incident to any of the above uses, including a storage garage, on a lot occupied by a multiple dwelling, hospital or institution.
      (2004 Code)