If you can do waitering, you can do anything. When reviewing CV's, I give preference to people who have waitering experience. You are likely more socially savvy than most people, and most any other work will benefit greatly from your waitering skills: keeping cool under pressure, memorizing small details, not taking things personally, and keeping people who have a lot less self awareness than you, happy. Just think what a wonderful world it would've been if more people could do this...