Was he angry, scared off, or just thought I was easy?
OP asked for possible reasons for why the man acted the way he did. It's right there in the post that you apparently didn't read. I offered one possible explanation based on experience.
I've repeatedly said that nobody owes anything to anyone else. You are the person who keeps suggesting that I said different. You seem like you're trying to paint me into a corner to try and get me to say something that I didn't. You're either arguing in bad faith, or are incapable of understanding someone else's point of view.
To clarify, yet again, the girls who would pull this trick would act as if they were interested in the guy that they chose, and were interested in sleeping with them. They were not interested in sleeping with them, they just wanted free drinks. The guys would find out at the end of the night that these girls were pretending to be interested just to get drinks, and would be annoyed that they had been tricked. At no point did anyone owe anything to anyone else.
A guy who had been tricked like this in the past might avoid anyone that he thinks might be trying it in the future.
Again, OP was clearly not doing this. I only offered this as a possible reason for the way that the guy in OP's post had acted. It was based on my own experiences from running a nightclub for several years, and seeing people act the same way.
I resent the fact that you're trying to twist my words to make it sound like I think that people owe other people sex, and I'm done with you. Go troll someone else.