Hi GL2,
I agree that the difference is slight.
Nonetheless, I believe there is one.
The Washington State Convention and Trade Center is conveniently located in downtown Seattle with our main entrance on the corner of 7th and Pike Streets. ...
The above sentence tells me the entrance is on the 7th street side.
The Washington State Convention and Trade Center is conveniently located in downtown Seattle with our main entrance at the corner of 7th and Pike Streets. ...
This tells me that it could be on either 7th or Pike street.
Any one with different interpretation ?![Smile [:)]](/emoticons/emotion-1.gif)