Friends came to me a while back.  The client asked me to remove the lamp and clean up the shirt.  Most people don't notice the dark shadows caused by the on-board flash, but they are a distraction, so I proceeded to remove these shadows, the mark on the man's shirt and the mark on the picture frame in the background. The dangling hand under the arm of the guy on the left was a bit distracting, so this was removed also.  The minor amount of glare on the eyeglasses was removed. The rich film coloring was left alone - there was no need to color correct the photo.