I am a waitress too! I was just the opposite. Tray in left and hand out with right. What really did me in after injury were those huge trays. I weighed one once. Fully loaded it was 27 lbs. All that balanced on your left wrist, held over your left shoulder. No wonder we are screwed up. Add in my car accident and it is a wonder I can even get up in the morning!
Trix