BI actually managed to write an article about all this... http://uk.businessinsider.com/sam-altman-ritz-sneakers-paul-...
Germany can't have startup hub because they are still formally addressing each other.
European cities have different neighborhoods. Relaxed and informal means different things in different neighborhood. I bet that if Altman would walk in with actual puma, they could arrange something. Not getting into somewhere with trainers in London is a sign that Altman was lost in the wrong neighborhood. Back away slowly and go to Slough
Interesting how the Ritz tried to "engage" with Altman after his tweet. I wonder what they would have said. "Sorry, the rule is for other people, not rich people like you" ?