I most certainly do have--and use-- social calling cards!

I have two:
1. "Mr. John Sandford Fleming MacLean, junior"
2. "Mr. and Mrs. John Sandford Fleming MacLean, Jr."

Contrary to what my learned friend MacMillan of Rathdown wrote, I use the title "Mr." on my card, as this is the form dictated by Emily Post and Amy Vanderbilt in ages past! It is also an accepted British usage, as well (viz. Manners and Rules of Good Society, or Solecisms to be Avoided, written by "A Member of the Aristocracy" in 1913! I cannot locate my Debretts Correct Usage book at the moment to see a more current British opinion!

M o R is correct, though, from a purely Scottish point of view. Chiefs and lairds most certainly would NOT use Mr.! As an armiger, perhaps I should get a card engraved as simply "Sandford MacLean." Since good engraved cards are not cheap, I can hold off on this little extravagence.