Here's a doozy for you.
About a year ago or so I went to my cousin "Ann's" birthday party. She was turning 30. Ann and I grew up together, we know each other well. Her roommate "Mary" was throwing the party, and it was to be held at a nice restaurant in a city nearby. A total of 12 people went to the dinner.
I wasn't working at the time, but I set aside $40 for the night. I figured that would be enough for train fare, my $10 entree, a beer, and some extra to throw into Ann's entree and drinks so Ann didn't have to pay for her birthday dinner.
Some of Ann's friends ordered several bottles of wine, of which I had none. These apparently were expensive bottles, as when it came bill time Mary suggested we all pay in $55 each for the bill. (No appetizers were had, no desserts were had, by the way. This bill was for dinner and drinks.)
I sat there amazed at having to pay $55 for 1 beer, a $10 entree, and a few bucks toward Ann's entree. I discreetly got up from the table, left the restaurant and went to the ATM up the block so I could get some more money.
I came back and gave my $55, as did everyone else. Mary counted the money and declared we didn't have enough to settle the bill and pay the tip. Apparently another friend of Ann's left before the bill came and didn't leave enough before leaving.
I offered $2-3 more dollars to help settle the gap. Mary stood up at the table and said "What the heck am I going to do with your 3 measly dollars?" and literally threw them back at me across the table, in front of everyone. I suggested that if everyone chipped in another few bucks then the bill would be settled, but if she didn't want my 3 measly dollars to help settle the bill, I'd be happy to keep them.
That was by far the most expensive ravioli and beer I'd ever had, in terms of money and my pride.
Asharah's comment: Does anyone else think the OP was at least partially to blame for her problem? I think she was perfectly justified in saying "My dinner and beer were only $XX, I didn't drink any of the wine, so even with a contribution to Ann's dinner, I don't think I should have to pay more than $XX toward the bill." And if somebody skips out without paying their share, I think it should be the hostess's responsibility to make up the difference.