I'm not sure this will count but a lot of the ones I've seen have been more odd entertainment. This stems from letting random family members do a turn. Perhaps this is a Northern thing. 

The one that springs to mind is the wedding where everyone was pretending that the bride wasn't pregnant (staunch Catholic family, etc). This was made difficult by the fact that she was beautifully swollen and practically at waters-breaking stage. 

To maintain the illusion they did a 50s style jive dance as their first dance, including her swinging round him and being dragged through his legs, etc. It was a curious form of entertainment and we probably shouldn't have cheered so much and called for an encore but I insist that we were just helping the illusion along. 

Baby's fine by the way.