Maypole dances are popular in Europe to celebrate the first day of May, but Renaissance Faire attendees have probably had their Maypole dances, too. If you're looking for an activity to get everyone involved at your own fantasy/Renaissance wedding (or any kind of wedding, really), a maypole can be really good time. If you're having the wedding at the faire itself, there's often a pole available if you ask, otherwise you'll have to make your own. And of course: learn the dance itself!
Here are Sheila and Jason doing the dance at their Medieval handfasting.