Anyone here this morning who once worked in a service industry?

(You can make this question rhetorical, or you can make this a karaoke moment and get your people to talk about what they did and where they worked.)

If you worked in food service you know from experience there are two distinct parts of your income: the hourly wage and your tips. In fact, generous tips are about all that makes it possible to live on many service-industry jobs.

Some of the more expensive establishments automatically add on a gratuity to the tab. But for the vast majority of service jobs, giving a tip is the unique moment in time when the served can make a personal statement about the service. For the wonderful waiter who made sure everything was just the way you ordered it, and knew when to appear and when to di…