I'm living in Ohio and visit two coffee shops on the regular with electronic iPad checkout. One has a tip in the checkout process while the other does not. In the tip included location I've seen people in front of me tip 20 to 30% on a regular basis for everything from drip coffee to the coffee milkshakes that everyone seems to be overindulging on these days. So people are willingly paying $8 to $10 of Ohio money for a coffee milkshake, or $5 for drip!
The Pulp Fiction shake quote always comes to mind for me:
Vincent: "I gotta know what a five dollar shake tastes like"