This is a great way to encourage people to socialize and mingle at your next party that has a longer guest list. Place a bottle that you would like to give away as a door prize in the vault and set it up with your chosen five letter code word. Figure out a long list of clues, none of which on their own give away the solution. As guests arrive, give each of them a different clue and let them know that if they would like to win the prize, they’ll have to crack the code by trading clues with other guests and piecing together the solution.