A Starbucks store in Hong Kong.Sebastian Ng/SOPA Images/LightRocket via Getty ImagesStarbucks is reversing its open-door policy, which lets non-paying guests sit around or use its loo.This means you'll have to make a purchase — or accompany someone who does — to use Starbucks facilities.The chain told BI that the change was made to prioritize paying customers.You'll have to buy a cuppa to sit around at Starbucks or use its loos.The coffee chain said on Monday that it would be reversing its open-door policy, which allows non-paying guests to use its restrooms or hang around in its stores.