I am a bartender. Here is the tipping pyramid from top to bottom, regardless of race, color, bunched up panties or whatever:
Top - Service Industry Employees! They rock! They know why you are at work on a Saturday night instead of going out with friend$.
Second row of bricks down - Super drunk people with a large group. Obnoxious and they feel bad about it.
Third row of bricks down - Gay men - who cares if you have to make drinks with 15 ingredients? Generally really polite and hot.
Fourth row of bricks down - Business guys going out - Wants to look civilized and pays accordingly.
Fifth row of bricks down - Folks on a good date. Everyone gets booty.
Sixth row of bricks down - Group of women. They get paid less - I understand, still a bummer.
Seventh row and downing - Folks on a bad date. Yes, I'll tip you and yes... get me a cab before I claw this idiots eyes out. Argh.
Eighth row, feeling the pressure - Foreign visitors who are reading their Fodor's guide, but too hammered to read it. Vat dast dis say, Sven? Don't know bork, bork... let's get another round! Tip them with one of those Golden coins we got from BARTI or are those silver?
Ninth row of bricks down - People of any other color, gender, orientation that think everyone is out to get you and mispercieve you being busy with you being racist, bitchy, evil or homophobic when that is not the case. You can kiss ass all night - but these people need an issue to feel alive. Oh joy. Oh rapture. You get to be that issue - hoorah, glad I am here for a cause. Watch soap operas people, join a protest group - fuck. Microscopic non-gratuity accompanied by a sneer and elitist comment. This does not happen often, when it does there is little you can do but remain polite like you always were.
Tenth row of bricks down - Dykes who don't go out that much and love to drink. They're usually really nice, but just spent all of their tip money.
Eleventh row -Old drunks. Self explanatory cause.
Row twelve - Random and weird bar visitors (usually neighborhood bar locals with whom no one else will speak to often) tip well every ten or so times. They interrupt every conversation and park themselves wherever you are thinking their very presense is emanating a gratuity. Blah. This does not include regular people who just want a beer after work or a shot.
Last row of bricks - squished beyond belief - People who correct others spelling and punctuation on CL and act as though grammar is the Matrix of all viable life, also people who use all CAPS. Also includes guys who send pictures of thier stupid schong on CL. Who gives a fuck?
Basement section - All right-wing, conservative pro-life Christians.
Had to be said.
***Tipping Pyramid may not include all specific forms of tippers, but rather generalize in an attempt to simplify.
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Think Inclusively Purchaser of Porter! Imagine (what could happen with a...) Non-Gratuity (heh heh)!