Starbucks rarely got my business unless they were the only coffee shop that was open in the airport (where you can’t have a firearm anyways).
So, Starbucks will be bereft of my protection.
However, if a customer of mine asks to be taken to Starbucks, I will walk in with my concealed weapon just as I do at a multitude of anti-gun stores.
Why?
I am not a sheep. I will not be defenseless.
If Starbucks catches me, what are they going to do? Not allow me to drink their overpriced coffee?
Exactly. They don’t have the right to stop you from doing something they can’t detect anyway. If they can’t detect it, then it must not be affecting them, in which case it’s none of their business. If it were affecting them, then they’d know you were doing it.