My nephew, heart of gold but still acts like he's 14, shows up at my last game. I asked him to bring 3 candy bars for my daughters, his cousins. He shows up and says "$5 for the candies will cover it". He then eats my steak tip chili, I give him $100 to rebuy (with no need to pay me back), drinks 8 of my craft beers and then asks to crash the night on my couch. I'm still WTF about $5 for the candy bars. People don't get how burden'ish it can be to host these things, let alone be so cheap not to contribute.
My neighbor, an Old Man Coffee type, always wants to count to the penny and brings like 4 dollars in quarters to ensure his cashout of $21.50 is exact.
I guess my theme is, I hate cheap people. When other people ask for $5 to cover food and drink, I give the $5 and I hate it when I see people say "oh I'm not hungry" or "I'm not gonna touch that". Kill kill kill.