Reservoir Dog's had some interesting points on "Tipping"
Mr Pink: I'm very sorry the government taxes their tips, that's F*cked up. That ain't my fault. It would seem to me that waitresses are one of the many groups the government f*cks in the ass on a regular basis. Look, if you ask me to sign something that says the government shouldn't do that, I'll sign it, put it to a vote, I'll vote for it, but what I won't do is play ball. And as for this non-college bullshit I got two words for that: learn to f*ckin' type, 'cause if you're expecting me to help out with the rent you're in for a big f*ckin' surprise.
Mr Pink: I don't tip because society says I have to. All right, if someone deserves a tip, if they really put forth an effort, I'll give them something a little something extra. But this tipping automatically, it's for the birds. As far as I'm concerned, they're just doing their job.
Mr Blue: Hey our girl was nice.
Mr Pink: She was okay. She wasin't anything special.
Mr Blue: What's special? Take you in the back and **** your ****?
Nice Guy: I'd go over twelve percent for that!