Starbucks has been working hard to bring back customers, promising faster service and a return its coffeehouse roots, with ceramic mugs and hand-written notes.
But though sales show signs of perking up, the company is still wrestling with a years-long labour fight that threatens to hamper its turnaround.
Picket lines could greet customers collecting their morning latte at some US stores on Thursday, as the company faces another strike by unionised baristas, calling for better pay and increased staffing.
The walkout, expected to affect stores in at least 25 cities, is the third major strike to hit the company in the US since the union, Starbucks Workers United, launched four years ago.


