That is why the 'owner' doesn't care.
That doesn't change the fact, raised in a sibling comment, that given the fixed cost of rent, having someone in the shop during off-peak hours is in a sense "advertising" the desirability of the place. Trickle revenue + "advertising" using up slack capacity seems like a clear win for them, given the pre-existing real estate investment.
Interesting. Then how come there are so many non-corporate Starbucks outlets? The ones that don't get the same new products and don't take their gift cards -- like airports, for example.
Agreeing with you, I'm pretty sure there's no way for an individual to open their own Starbucks store; the licensed stores pretty much have to exist within a larger organization where it would be impossible to open a store independently (in the local cases, that'd be due to the food service unions).
In Canada at least, there's also instances where Starbucks has worked out some kind of cross-renting deal. Chapters/Indigo Books is a prime example. Every Indigo I've gone into has had a Starbucks, but those are staffed by Starbucks employees and not Indigo employees.
First, congratulations on your launch! I hope to try Wheelys out soon!
A bit of well-intentioned feedback regarding your positioning strategy: as I am often the customer you mention who sits at Starbucks (or other coffee shops) all day, I can assure you that the owners don't perceive me as a cost even though I don't buy much (I often speak with them and ask about life as a small business owner). In fact, at locations I often visit, it's very common (say 1 in 3 visits) for the managers to give me a tiny freebie. Maybe I'm just a likable guy, but I don't think I'm so charismatic as to completely warp their perception of me being a drain or a benefit.
I think one important point is that I make sure to buy something any time I'm taking up space and the place is crowded (say 70+% fill rate on seating space). But that's at most 2 hours per day (the morning pre-work rush and the lunch rush). In those peak hours I would agree that I am taking up valuable real estate and should contribute something to their upkeep.
Anyway, congratulations again and I hope to see one of your sites soon!