This is an interesting one. I worked for a digital marketing agency several years ago who had an office in Leeds and London. In Leeds everyone would say hi, have the occasional chat over a coffee and say bye at the end of the day.
Working in the London office was so different, only greeted by the receptionist, no real pleasantries, no chats over coffee and a deadpan look when you get up to leave.
I found it a strange vibe. To be fair, in the same way I realised quickly it is every man for themselves on the tube. Leave the Yorkshire charm on the platform when heading to London.
Added, thanks