Not Starbucks, but...
I do ride to our local coffee shops.
When I go, I take Lulu, my runaround baby blue Schwinn Suburban, to which I keep my U-Lock always locked on the rear rack. Whenever I need it, panniers or not, the lock is there.
I'll lock to pretty much anything that looks respectful and trustworthy. Signs, benches, whatever.
Nothing like cruising up to a coffee shop on a super-cute "vintage" bike.
2007 Trek 5000
2009 Jamis Coda
1972 Schwinn Suburban
"I rejoice every time I see a woman ride by on a bike. It gives her a feeling of self-reliance and independence the moment she takes her seat; and away she goes, the picture of untrammelled womanhood."
Susan B. Anthony, 1896