Most venues have a video monitor on site.
Take a thumb drive of your photos and have them run during the social or cocktail hour.
This gives your guests something to focus on, and talk about.
It also helps the time seem to go by faster,
while you are taking your family photos after the ceremony.
With conversational music playing and the slide show running,
your guests will be entertained as they wait.
Hint: mix in a few funny quotes about marriage and childhood photos