The Shoe Game.
During reception, after you’ve enjoyed some dinner, dancing, and drinks, place two chairs back-to-back on the dance floor for the bride and groom. Remove both of your shoes, then trade a shoe with your new spouse so that you’re holding one of each. Then, have a designated person ask a series of questions about the two of you and your relationship (i.e.. “Who will be doing most of the cooking?” "Who said 'I love you' first?"). After each question, hold up the shoe of the person you think is the best answer to the question.
Ask your guests to use their digital cameras or smartphones to capture the moments even the best photographers sometimes miss. Add a line on your “I Spy” card with an address where guests can upload photos. Bonus: With digital cameras, you don't have to worry about wasting money developing less-than-stellar photos from disposables.
Create bingo cards, but replace the word BINGO with WEDDING along the top margin. Instead of numbers, list facts relevant to weddings or the married-couple-to-be inside each square. (for example, the place they got engaged). Follow traditional bingo rules: the first guest to mark off a line horizontally, vertically or diagonally wins a prize.
Music plays while the bouquet is handed from guest to guest, and the music stops at intermittent points. The guest holding the bouquet whenever it stops is eliminated, leaving the rest of the guests to duke it out (in a friendly manner, naturally) until all but one lucky player is eliminated.
Bride and Groom Love Story.
Players take turns thinking of lines to add to a romantic story about the bride and groom (example: bride and groom met at the office). Pass the sheet around and have each person write a new line, folding the paper to only reveal the freshest sentence. After everyone has contributed, the final piece is read aloud to the bride.