Almost every counter service place I go to now has a jar on the counter for tips. And I don't understand why.
I feel awkward getting change back and not putting some in the jar, but at the same time, I feel more embarassed if I just put in a quarter. But when my bagel costs $1.90, I don't feel a $1 tip is appropriate.
How about this: no tip jar, and if your service rocks, I'll hand you money myself.