I'll start.
My (very well off) grandparents were like this. I think I've told this story before on here;
We went to stay with them (my dad, my daughter me) for the weekend. They're notoriously tight and don't keep much food in the house, grandmother didn't like cooking and grandfather wouldn't eat anything he classed as 'exotic' (all veg apart from peas and sprouts, chicken, potato in any form apart from chips, spaghetti bolognese, curry, noodles... the list goes on and on and on.) They rarely ate a proper dinner.
He survived on toast, crumpets, ice cream, biscuits and cakes; I'm not overreacting here either.
Whilst staying there we had to order tea because, if I cooked something, they'd be out there hugging and puffing that it smells funny, their eyes are burning, saying 'you'll have the bellys tomorrow'... so we ordered fish and chips.
We asked them a few times if they wanted anything and the kept saying no, even though we were paying, so we ordered our food and that was it.
Dad picked it up and brought it back, I went upstairs to get DD and he needed the toilet. In the 30 seconds it had taken me to get DD GM had taken half of my dads portion of fish and DDs whole portion of chips (in one of those polystyrene boxes) to serve herself and GF. I was
it left us to share one portion of chips, half a fish and one sausage to share between us 3.
I actually went in to them and asked what they were playing at. Their answer? Oh there's no way you 3 could've eaten all that. I lost it a bit and said that since they'd taken daughters dinner and half of dads they should pay half. GM was incredulous but did give the money over and they never did it again.
They were like it with everything though and it was just the final straw.
Another occasion, I bought 2 boxes of 12 Krispy Kreme doughnuts for a birthday thing and left them in their kitchen to take home that night.
Went out to do some shopping, came back to take them home and 11 doughnuts out of one of the boxes had gone.
Again, I was incredulous at how someone could a) be so greedy b) be so selfish and c) do that without even asking.
11 doughnuts (KK are notoriously sweet too) between two people in about 5 hours.
Have you any good stories?