Well, from my experience... I've been on both sides.
I've had more than one occupation that I could accept tips, and I'll tell you first hand that I give a whole lot better service to people who tip, regardless of the amount, than to cheap bastards who can't spare a fucking dollar. I've gone back and done extra stuff for people who tip. I've given stuff away to people who tip. And the one's who don't, get what they pay for and that's it. Thank you very much, and don't let the door hit you in the ass on your fucking way out.
From the other side, I tip anyone in a service position. It's not so much about the extra buck than it is about showing appreciation & acknowledgement for their services. And it DOES pay off. People remember shit like that. And if you're so broke that you can't spare a few bucks for a valet or someone, then you probably shouldn't be at a place that has valet parking in the first place.
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