We started dancing at about... 4 (we had a lunch instead of dinner) the dancing ended at 11pm. Seriously ppl, you guys need to know how to party.

It was more like 5 hours when you consider the speeches, and all that jazz.
So before my wedding, I told my bro and another groomsmen about my thoughts about doing a prank on my wife. They thought my idea was great so they went and got me the biggest brown undies they could find, stuffed it in my sleeve, and I took it out while under the dress when getting her garter. It turned out really funny, and my wife didn't kill me. We threw the undies out after the garter.
Just be cool and calm no matter what. Our priest was flying in from Venezuela (he's been in her family since she was little), and we found out he wouldn't be able to make it the day before (all flights were cancelled due to the weather). Also, the night of the wedding, after the wedding, we had to go help a friend who was caught driving drunk. Yeah... good times! Still, the hardest part was getting the groomsmen to focus during the pictures. Man, they were so drunk (2 ran off to play basketball against some kids at the park).
hypernova: Lol. There are speeches and a candy buffet included in that time so it will only really be 4 hours of dancing. It is a Greek/Italian - believe me there will be lots of dancing!
EDIT: And thanks for the congrats! 
philharris: Thanks for that! I am only foiling the "&" on the front invitation, so I could get away with one stamp also and it would only need to be 60x30mm tops! How easy is it to foil?
The thing I really want is the debossing! I would love to have plain white A6 textured card with all the bits in purple bits debossed - gives the invite a real professional feel.