in coffee-crazed seattle, there is a starbucks outlet for every 9,400 people, and the company considers that the upper limit of coffee-shop saturation. in manhattan's 24 square miles, starbucks has 124 cafes with more on the way. that's one for every 12,000 people meaning that there could be room for even more stores. given such concentration, it is likely to take annual same-store sales increases of 10 percent or more if the company is going to match its historic overall sales growth. that, as they might say at starbucks, is a tall order to fill.