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As she walked up the street, she glanced back and saw the man in front of the bar staring.

Can you tell where the man was, inside the bar or outside?

Thanks!
Comments  
It sounds to me as if the man was outside.
If the context is,

She was halfway to the door when she saw the new guy at the piano. As she walked up the street, she glanced back and saw the guy in front of the bar, staring.

Now, do you think the guy is in the bar?
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She was on the street, walking, so she could not have seen anyone inside the bar unless she had X-ray vision. Emotion: smile The guy had to be outside the bar. He had to have left the bar. (He must have been very interested in her -- whether for good or ill, the excerpt does not say.)

CJ
NTG, X-ray vision aside, it's how we use "in front of."

I'll meet you in front of the restaurant at 7:30. I'll wait for you in front of the school so you don't have to come it.

It means standing OUTSIDE the building, between the building and the street.
New2grammar:

FYI,
walked up the street: means walking along the street
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Thank you everyone. One more quick question, if a person is inside a building, on the front side, how would you describe that?
Hi,

One more quick question, if a person is inside a building, on the front side, how would you describe that?

I wouldn't say it that way.I'd say

He is inside a building, at/near the front.

Best wishes, Clive
Thanks, Clive.
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