[My husband] says he cannot understand people who catch a bus with the same group of people every day, but who never acknowledge each other, or say hello, so he makes the effort.
Anyone remember a Seinfeld episode where all of the residents in Jerry's apartment building decide they're all going to post their name and photo on the notice board in the lobby? Everyone ends up being friendly and saying hello to each other, but Jerry's the only one who's unhappy with it all. Hilarity ensues.