Hair Cuts at Great Clips (or where ever) do you tip?

To quote Steve Martin, "It's not tipping I believe in. It's overtipping." I always used to tip the gal at Great Clips $5. Same with the waitress at the greasy spoon where we eat on Saturday. I figure they need to feed their families too.

Last year I bought a Wahl clipper and trimmer set at Wally World for $40 and haven't stepped foot in a clip joint since!!