According to Lowe, the game did not initially do well commercially, since the rules and appeal were not easily conveyed in an advertisement. Eventually, he had the idea of organizing Yahtzee parties at which people could play the game and thereby gain a firsthand appreciation of it. The idea was successful, and enthusiasts quickly popularized the game through word of mouth.
via en.wikipedia.org
Buzz marketers, it turns out you have an ancient (well, relatively) and venerable pedigree.