With the advancement in lighting technology, many venues include uplighting or your DJ can provide uplighting if your venue does not include it.
There is a fine line between being able to see the uplighting in your photos and overpowering your photo with a flash that you cannot see the uplighting or the uplighting "spills onto the dance floor covering your guests in colored light.
As professional photographers, we have to know that balance or how to get that balance. Each room being different shapes and sizes make a big difference in the camera setting and if the uplighting is visible. After all, the uplighting is there for a reason. Let's be sure it is visible in your photos.