snazzy I know, I don't even think they are that rich, but the disregard to other people's situations really hurt because I genuinely should be budgeting and I genuinely need every penny now I am a single mum and I have childcare to pay for and rent and I have to actually, you know, feed my son rather than pay for their fat tummies to get fatter with the crazy amount of beer they consumed
especially after I objected
and then there was a huge tip left over - after the 12.5% had already been added, so I said ' can I take my last 20 back (though the tip was much much bigger than this and I seriously overpaid the rest of it) and they laughed, and I said, no really, I am a student! I am on a budget! and they were like, no just leave it let's leave a 25% tip 
so I just thought, okay, cafecito, stop looking mean and petty, just leave it... but I felt bad the next day when I realised actually, that's DS's new shoes, coat, books, food for him...
I am a really generous person, and I used to be very careless with money, I still can be, but when it's paying by choice it's different- say you go out and buy a round of drinks voluntarily, or stick a tab at the bar for the table - it's your choice to do that. But to have that choice removed, I don't like.