Cafe Conversations

There is a bit of confusion in the cafe I work at because we serve Starbucks coffee and display the Starbucks logo. People believe that they can use their Starbucks' Gift Cards with us which is an understandable thought. We politely tell them "No, I'm sorry we can't accept the Starbucks Gift Card but you can use any of the B&N Gift cards or membership cards here." Most people are quite gracious and understand. Of course there is always that one dipsh*t who wants to argue.
"But it says Starbucks right there on your apron!"
TO which we reply "Well sir, it says B & N cafe serving Starbucks coffee. We are a part of the bookstore, not Starbucks."
Naturally someone will always want to argue this further as happened to me yesterday. We had already gone through the whole spiel and he kept saying "But it says Starbucks right there!" pointing to one of the half naked mermaids. Finally I got to the point where I just put on a smile and replied back "Yes sir, we serve Starbucks Coffee, but we are the Barnes & Noble cafe we can accept any Barnes & Noble gift card, but unfortunately we are unable to accept the Starbucks card."

Man: "But it says Starbucks right there!"
Me: "Yes sir, we serve Starbucks Coffee, but we are the Barnes & Noble cafe we can accept any Barnes & Noble gift card, but unfortunately we are unable to accept the Starbucks card."

Man:"But it says Starbucks right there!"
Me: "Yes sir, we serve Starbucks Coffee, but we are the Barnes & Noble cafe we can accept any Barnes & Noble gift card, but unfortunately we are unable to accept the Starbucks card."

And we did that another three times. That's right, we went through that 5 times. There comes a point where there is nothing more you can do so I thought "screw it, I can do this ALL DAY LONG with a fake smile plastered to my face. Eventually I did win out and he pulled out a credit card and couldn't even bitch because I was unfailingly polite.