Have access to a big projection screen or a big white wall? Instead of using it for a slideshow, use it for epic video game fun that most people can't get at home on their small screens. In Anie and Andrew's case, it's giant Dance Dance Revolution as their "first dance."
Replace the game with your favorites like Rock Band or Wii Play, and you'll have a reception activity that will have guests forming a line.
Check out our video games archive for more inspiration, like Adele and John's and Kirsten and Dustin's Rock Band fun, respectively: