Quote Originally Posted by azfiddle View Post
I have parked my bike by a window- and have wheeled it right into the grocery store with me when I didn't have a lock.
My grocery store has been nice about letting me leave my bike inside across from the checkout lanes when I've forgotten my lock. Not that the checkers can actually watch it, but it might dissuade someone from walking off with it (just by it being in view).

I often see bicycles indoors at restaurants and locally-owned coffee shops and doctors' offices. Generally right near the door. Sometimes there will be unlocked bikes in the library foyer. Not the safest options in the world, but you could always ask if you can wheel the bike in and leave it inside near the door.

ETA: Starbucks has never let me bring in my bike, and I've never seen one inside.