While the vast majority of customers at Starbucks are likely to be in somewhat of a rush, particularly during the morning, it's not uncommon for people to request a queue-jump.
STARBUCKS BARISTA’S TOP 5 PET PEEVES, HOW MANY ARE YOU GUILTY OF?
1. Not saying which size you want
2. Ordering while on your phone
3. Dumping non-empty drinks in the bin
4. Specifying any modifications only after your drink has been made
5. Asking 'is this mine?'