A good friend related an experience with McKay at a reception.  In a moment of courage, the hostess served rum cake.  All the guests hesitated, watching to see what McKay would do.  he smacked his lips and began to eat.  One guest gushed, "But President McKay, don't you know that is rum cake?"  McKay smiled and reminded the guest that the Word of Wisdom forbade drinking alcohol, not eating it.

-Leonard J. Arrington, Adventures of a Church Historian (pg. 42)