This has just occured to me. As much as I like using the name "Parlor Car," for certain Cadillac Fleetwood 75 Limousines, it would probably be a good idea to convert them all to "Cadillac Fleetwood 75 Formal Limousine."

Bear in mind that mackster just posted a link to an ad for both the regular and formal Fleetwood 75 limos of the early 1980's:
http://www.imcdb.org/vehicle_361424-Cadillac.html
http://www.lov2xlr8.no/brochures/cadillac/84caddy/bilder/12.jpg
However, from the exterior, the "formal limousine" doesn't exactly contain that blocked-off window that earned them the nickname "Parlor Cars."