Why is it "cool" to tip at Starbucks or any other "in" place to get your coffee, why do their employees deserve a tip than those at any other fast food place, I doubt anyone tips at McDonalds, Burger King, Tim Horton's or any other fast food restaurant, and that is what Starbucks is, just a fast food coffee joint.
I'm curious to see as to who considers tipping at Starbucks as "cool". I imagine people tipping who like their stuff really custom "No blah blah, add this and that, add half of that etc" This way I see that tip is deserved since you wanted your stuff made almost to "perfection".
But even then I wouldn't tip all the time for service like that.