Whenever you walk past your colleagues in the corridor, stairs or whatever do you still say a quick "hello" (i.e you've already said good-morning the first time you all arrived at work). I mean colleagues who you work with day to day so not a random contractor or whatever. So after your initial greeting in the morning; but if you walk past them do you still say a quick hello, and is it the norm to not or is it rude not to? I'm just wondering because I just don't know anymore, I always say hi but it appears that might not be the norm?