I didn't even know Starbucks had outlets in BA till I spotted one at Alto Palermo. To be honest since I had a cappuccino in the Empire State building Starbucks which consisted of 9/10 froth I have not been a great fan so tend to avoid them.

I find drinking a coffee in one of the many cafes a far more pleasant experience....one is amongst the locals and not a load of tourists clutching their Lonely Planet guidebooks.