The Unexpected Reaction to My Kind Gesture

I’d just received a raise at work and was in an incredible mood. I decided to buy coffee for the next 10 people behind me. Not a single person said thank you, which wasn’t a big deal.

Then a girl who got one of the free drinks comes up and tells me that I’m creepy and weird and this isn’t a bar, and it’s creepy to buy people drinks. She walked away laughing and pointing at me with her boyfriend. She said this while sipping from the coffee I bought.