Hard to do when starbucks is a real estate holding company that sells coffee. They have sucked all the air out of the cafe space and driven out their competitors.
Driven out their competitors where? In Seoul, Twosome Place and Hollys are ubiquitous, there's a few more chains whose names I don't remember off the top of my head and plenty of single-location cafes remain as well.
They had a policy of saturating an area until all the competition closed then withdrawing shops until they were profitable. It was quite common to see two Starbucks across the road from each other.