When I worked as a Barmaid/Waitress it was herd work especially when it got busy. As i would have to serve customers quickly, trying not to make any mistakes with their orders and their change.
The hardest part of this job was being paitient and having to try and keep a friendly, pleasant attitude.
The most enjoyable part of this job was meeting lots - more ... of new people from around different places and having good communication with others. - less