Small business owners have little of either time or money. Anything you can do to improve that is appreciated. Although SBUX is much larger than the family owned businesses I'm familiar with, I'm sure they appreciate it, too.
We've only owned 1 restaurant and if we were high volume enough, being able to carry the register over to the table and have customers pay right away would have been useful.
If I'm reading Square's website correctly, there's a minimum $1 transaction? Our shoe store in 1990 probably wouldn't have cared. Our coffee shop today would care, though.