Silly games
These are games where the prize isn't money or an item, but an experience (or the avoidance of an unpleasant experience).
For more games, check out the games of chance or the games of skill pages.
To Sing or Not To Sing
Set out two large jars, one labeled "To Sing" and the other "Not To Sing". Guests may put money into either jar to vote. The winning jar determines if bride and groom have to sing a song later in the evening. You can calculate the winning jar by height of fill or by value total.
Jail / Penalty box
Build or rent a "jail" or "penalty box", and nominate two of your volunteers are "sheriffs" or "referees". Guests may pay to put their friends in "jail". Guests in jail are not allowed to talk, drink, or use their cell phones. Jail fees are set at an amount per number of minutes, and jailed guests can buy bail at double or triple the original amount. Bride or groom fees may be doubled. Guests can also buy single-use "get out of jail free" cards during the event from the sheriffs to avoid going to jail in the first place.
Pie insurance ($1-$2)
Guests may buy this "insurance" at entry. You can work it in one of a few different ways. Option: Guest gets an insurance card, stamp, or mark on purchase. If they win a prize and don't have it, they get a pie in the face. Option: Guests who decline insurance have their names taken down, and a name is drawn from the declined insurance list at the end of the night. That person gets pied.
Pie in the face auction
There are a few different ways to run this. Option: Run it like an auction, with the highest bidder deciding whether the groom or bride gets pied, and throwing the pie. Option: Two money jars, one for bride, one for groom. Judge by fill line or value total. Jars may be set out on the ticket table, or you can have each of the happy couple wearing a collection box to get the other pied. Option: Anyone can buy a pie to mash bride or groom, $5/pie. Also you can have a separate auction or contest for who gets to throw the pie. The "pie" is whip cream in a tin foil pie dish. You'll want some extra supplies like garbage bags to protect the victims' clothes (or an available change of clothes) and paper towel for cleanup.
Groom dress-up
Set fundraising milestones. For each milestone, do something to dress up the groom. $50/$100/$200, etc. Keep a big board with the current fundraising level on it where everyone can see it, and see when it's getting close to a milestone. Things to do to the groom: paint his nails, get him to wear a dress (usually a mock wedding dress or old bridesmaid dress). Have the bride remove his garter with her teeth. Dances with the wedding party. If he's game, for high milestones you could wax him a little!
Wedding party auction
Run a raffle or auction for the members of the wedding party to perform actions for the winner. This can be just about any action - from carrying their drink around for an hour at the event, to mowing their lawn.
Dance raffle
Auction or raffle off the chance to dance with one of the happy couple.
Kissing booth
Dollars for kisses, how much simpler can it get?
Paintball
Let guests buy in to fire paintball shots at the groom. Make sure to set this up safely!
Mingling Games
There are a few ways to set up games that encourage people to mingle and get to know each other. Using any kind of item that has matched pairs (two sets of playing cards, or many different sets of nuts and bolts), hand them out and whoever first finds their "other half" wins a prize.
What about...?
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