I recently shot a mix of formal and casual portraits for a graduating class of Scott & White surgical residents, and we had a lot of fun with it. I really like how they turned out, especially because we had a very small window to get everyone together and shoot. (Try scheduling even an hour when five surgical residents are all off and available at the same time.) I only included a couple shots of the more formal headshots. I have to say it's pretty awesome shooting in an OR because you can make a pretty sweet studio set-up out of the equipment they have for operating.