Dude. Why in hell would you expect a very much NON-STARBUCKS place to take a Starbucks card? Do you expect a Best Buy to take a Circuit City card? Or to be more locally and situationally appropriate, would you expect TAGS to take a Home Depot card?

Sorry, but it was annoying enough when I used to work at Borders and people would throw a tantrum fit to wake the dead because I couldn't take their Barnes and Noble gift card.

Seriously. Different fucking companies.