I stand corrected. I DID go to a Starbucks recently in London. It was completely empty. My colleague (who had requested that we stop there as there was nothing else open in the area that day), was asked for his name. He was confused as to why, and had to give it three times before they understood (common German name with a simple English variation)

The enter time we stood and waited for his drink, nobody came into the shop. When his drink was ready, the barista stood in front of us and loudly shouted out the (wrongly pronounced) name. We said 'er, that's us...' and looked around the empty shop.

When we left, we both burst into giggles at the bizarre and absurd exercise. Neither of felt that service was enhanced by this 'customer service' game.

And like the other posters, I have never had an issue getting the correct coffee in a London coffee place. And we certainly didn't get a free coffee for participating in the theatre.