LOL
I do the same - I eat out for lunch quite often, and where I go the most (two or three places) I leave a 2 or 3 dollar tip for a 7 dollar meal (lunch place remember)
Next time I come, the staff is right there - and at my regular places, my meal is at the table shortly after I sit down. So the extra couple of bucs is a good yield if I happen to be in a bit of a hurry that day.
BTW - I met my wife while she was working in a cafe - out in the middle of nowhere in the West. Liked the service so much, I came back and took her home with me - that was 30+ years ago.
Well, I always order the same thing so, at some point in the last four years, I've stopped even ordering at that particular place. I just sit down and, poof, my meal appears after a few minutes.
Best Fish & Chips I've ever had. I'd eat there every day, save for the obvious downside of such a diet.