Activity for Desiree

We are thinking about having the ceremony and reception in the same place, our church. I saw that people are having a cocktail hour to keep guests entertained while the party took pictures, but with this being at our church we cant really have...

We are trying to cut costs anywhere we can, and we can use our churches gym however the walls are a light shade of pink....... yeah ... Any ideas on how we can cover up the walls? Or is it a lost cause?