Sometimes I do, often I don't if I'm wandering through a different part of the building, but one colleague has started making a point of giving me a cheery "morning". I have to walk past an awful lot of people. I don't even know all of them. I'm not even 100% of morning lady's name.
I do greet the people I actually work with.
Are you a morninger? Or not a morninger? Do you judge the non morningers?