What I find interesting is that this article re-iterates that many times credit card processing fees have been entirely or partially subsidized out of the _tipped employee's tip_.

I was recently eating dinner at a French restaurant in Seattle that is working toward introducing a service charge (the current Seattle practice of a fixed service charge, vs raising prices, as consumers don't want to see a $40 steak frites on the menu before tax) and the owners were most concerned with how to fund the credit card fees, since they had not been doing this at all!

Talk about unfair to the workers...