Bar etiquette

[Brian37]

I don't see where you did anything wrong.  You went to a bar and another patron tried to engage you in conversation.  This sociological phenomenon is known among academics as 'How People Behave In Bars'.

Boru

Here is how it has gone for me at bars in my life.

See an attractive lady, slide up and sit on the bar stool next to her, turn my head, start to open my mouth and raise my hand to offer her a drink, and before I can say a thing "SLAP!"

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I'm a straight guy. 

I went to the bar today and the bartender wasn't at her station. Another male customer who was seated with a drink looked at me, so I said hi. He said the bartender had just gone out. She (the bartender) returned a little later and I then ordered my usual glass of red wine. The man then asked me if I was from India, so I said yes. He said he was from Punjab (which is also in India). I then went to a corner and had my drink while browsing the internet. After I finished my drink, I went to the till and paid the bill, whereupon the man asked me if I was studying here (Canada). I said yes, I was studying math at the university. He asked me if I wanted to be a teacher, I said I hadn't decided. He asked me if my parents would come to Canada. I said no, they were fine in India. I went back to my corner and continued browsing the internet for a couple of minutes upon which the man started saying something to me. I couldn't hear him, so I went up to him and then he asked me if I wanted more wine. I said I was fine, went to my seat, packed up and left with a weird feeling.

Question: What did I do wrong? Did I break some unspoken rule of bar etiquette?

The only problem I can see is that you left witnesses.

Must try harder.

HA HA HA, forgot the shovel and the lime salt in the trunk. Never go anywhere unprepared.