Back to the OP - Some cultures are different, here in the UK we may (should) say "Good morning" or "hello" to people we meet but sometimes not, but we all kind of respect each other's decisions on this - its part of the stiff upper lip that brought us
"top nation" status until the 20th century.
Starbucks recently decided that the servers ("Barristas" - muppets, you mean the coffee makers - don't try and make it sound cool) should try and "engage" customers in chat which kind of annoyed people here. On one occasion the server asked the customer (annoyed) his name etc. and from the back of the queue came the classic response:
"Don't tell him pike..."
from here
Otherwise we (the UK) are kind of friendly and like to chat. Well except the Scots, some of the time. And the Welsh struggle with language...