That's because he plans to ban tipping in favor of paying his servers an actual living wage.
2016年12月四级真题（第一套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
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服务器
In computing, a server is part of a computer network which does a particular task, for example storing or processing information, for all or part of the network.
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(网球或羽毛球的)发球者
In tennis and badminton, the server is the player whose turn it is to hit the ball or shuttlecock to start play.