Just a shot in the dark, but from your setup you and another person were meeting up at a bar, and then they got mad when you were only interested in talking about work... Maybe she was interested in you and kept dropping hints and you were impossible to derail from your number theory laptop notes?

As a side note a girl once asked me to help fix her computer in college (both of us majoring in math), and she was slightly annoyed when I came over and couldn't find anything wrong with her computer. It was a laptop, but she said it only caused problems in her dorm room.... I later felt extremely stupid!