When working alone I normally work foul line to foul line on the side opposite the table. Obviously there are times when I need to alter that to see individual plays, or if the style of play requires it. But that's my default way of working.
As for the bonehead in the stands, if he's seriously distracting you, ask the gym manager to take care of him. Otherwise, he paid his money and he can talk all he likes. I feel sorry for his kid; he probably cringes everytime his dad opens his mouth.
