A rare hand in blackjack, wherein the player is dealt three sevens in a row. Most casinos make a relatively big deal of it, serving a free glass of quality champagne to the lucky player in question.

The last time I was in Las Vegas, I got dealt two champagne 21 hands by the same dealer in one night. While there was much rejoicing around the table and I was happy to receive my complimentary drinks, I noticed that the pit boss started giving the dealer the evil eye whenever I started a new hand with a seven.