Starbucks eyes Roastery flagship on Mag Mile Posted on 2017-04-17 by news BREAKING BUSINESS ALERT April 17, 2017 Starbucks eyes Roastery flagship on Mag Mile Starbucks is ready to bring its sprawling Roastery store concept, which the company calls “coffee as theater,” to Chicago’s Magnificent Mile. At 35,000 square feet, it would be the coffee chain’s largest Roastery location. ADVERTISEMENT