As a former waitress, my thoughts are: 1. You might have been "profiled." Women of a certain age are not known as a group to be particularly good tippers. It is possible your waitress decided based on sight you weren't worth the effort. 2. You might have been ignored because women of a certain age are, in my experience - and much to my shock - apparently invisible! 3. Waitressing is actually a profession that requires a certain amount of skill to keep track of all the moving parts. Not every business recognizes this, and you may have just had a particularly bad waitress.

In solidarity. . .