As long as you are not a few weeks out from competition?

Explain this.

What is the deciding factor when it comes to being able to drink a few glasses and not being able to If you are close to competition? Would a few glasses of wine really make that much of a difference ?
Would the average person on the street really be able to tell if a guy was in competition shape or not? Or would you only be able to notice things if you were a judge at a competition? Basically its a very fine line that could determine if a person wins or not? Correct?