First, you need to get bracelets to distribute to your guests. Then, as your guests arrive to your shower, give them a bracelet.
Explain, as they walk in, that the rules of the game are:
If a guest utters the word "WEDDING" during a conversation throughout the whole shower, they must give up their bracelet to the person who catches them.
The idea is to get the most bracelets by the end of shower to win a prize.
Another variation of this game is using close pegs instead of bracelets and have them clipped on your clothing.