On the flip side, I recently REWARDED my usual barista at my favorite coffee shop I go to sometimes by my kids school. I noticed that in probably the couple dozen times she served me (both drive-thru and walk-in), she would literally hit skip on the tipping part and never mentioned it, never said the now typical "the screen's gonna ask you a couple questions," nothing. She was always above and beyond cheerful, provided excellent service, and seemed to go out of her way to not request tips. I'd usually toss a dollar in the tip jar anyway, but I appreciated her approach so much I slipped her a 20 last time I saw her and thanked her for her always outstanding attitude and quality service.
THAT'S how it's done, service workers!