Christine the Lioness commented
They have a right to put the jar out there, just don’t put money into it. I don’t. I think it’s ridiculous too that people who make coffee at Starbucks or sandwiches at Subway think we should tip them for doing their jobs. I think it’s ridiculous for people sitting on the street playing guitar to expect a tip, but hey… it’s a free country and obviously someone is throwing some money in or they wouldn’t keep doing it.
ProphetJoe the Irreverent said this
I contribute. I *will* tip the bartender — generously. It helps them and it helps when I want to get the wife drunk quicker
I will *rarely* contribute to the sandwhich shop, check-out counter, etc, and when I do, it is almost always a few cents which I deem not worthy of carrying in my pocket (or if I lack pockets) — in other words, it’s generally done for my convenience, not their “service”
Is it hypocritical to tip a woman for a haircut or a drink, but NOT tip a female prostitute for sexual services rendered?? 
Mara the Peacemaker added
PJ, YES!
Trouble the Pirate pontificated
Scenario #1… Bartender reaches into cooler, extracts a Miller Lite, twists off the cap, hands it to you, says $3.50, takes your $5.00, makes change… You leave a buck-fiddy tip…
Scenario #2… Barista grabs a 30% pre-consumer-waste recycled, grande sized paper cup from the stack, opens the 70% post-consumer-waste recycled, cardboard sleeve and inserts the cup, pulls the lever on the coffee grinder several times measuring freshly ground coffee into two of the do-hickys with the handles and expertly twists them into the machine thingy, and pushes the ‘double shot’ button to expel the espresso into two separate shot-glasses. Then he/she fills the metal jug with the exact amounts of half-and-half and skimmed milk you specified, heating it with the steam wand thingy until it is the perfect temperature and consistency, being careful to shut off the steam and wipe it clean for the next customer’s order afterwards. Then they add the two shots of espresso, the almond, maraschino, caramel and licorice flavoring extracts you wanted to the cup, and pour in the milk mixture holding back the foam with a spoon until the very last minute, when they scoop in the three teaspoonfuls of foam that you told them explicitly to add. Then they carefully shake on the white-mocha powder and cap it with the plastic cover so you don’t burn your lap when you drive off like the McDonalds lady… Viola… Your “Grande, double-shot, half-skinny, cafemochalicachinomondolattemericano with light foam” is complete… They say $5.50, take your $6.00, make change… And you pocket the 50 cents…
You bastards…
…And Mara… I always tip for sexual services rendered…
Christine the Lioness hunt n' pecked this
Having been a bartender, I can tell you that reaching into that cooler makes your hands really cold and ruins your manicure very quickly. There’s much greater physical risk in bartending… 
Mara the Peacemaker pontificated
The truth about what a barista really endures finally comes to light…Trouble is our hero.
You forgot to mention the customers who order somewhat pretentious drinks only to find out that they don’t know shit about coffee. Like the woman who orders the tall quadruple shot skinny mocha, light on the chocolate and then complains that it’s too strong and forces you to re-make the drink THREE times.
Christine the Lioness said this
Is that anything like when I was a waitress and people would order their prime rib “rare” and then send it back because it was too bloody? Or the a-hole who once complained to me because his red wine was room temperature. For those who know me… I am too much of a bitch to not point out that red wine doesn’t come chilled. Some people should just stick to McDonalds and leave the classier restaurants for everyone else.
I haven’t had any sleep in 36 hours, so I’m kind of in a pissy mood. 
Christopher the Pyro spake, and sayeth
I’ll second that.. (about the pissy mood)