Yes I do at least one of the common greetings depending on the situation. I waive to cyclists going in the opposite direction if going at a good clip - say hello or good morning (afternoon) if passing. When people are working in their yard close enough to the road I say good morning or afternoon. Also when passing I give one ring on my bike bell and when I go past I often say "Just saying Hello" . I will often say hello to pedestrians at cross walks and if they waive me through give them a hearty "Thank you".

I have to say that I am most often rewarded and seldom ignored. People usually welcome a friendly gesture and I am happy to initiate. I find very few are the initiators.