I worked in offices for 11 years, rules were liberal, we always said, "Good morning" and a lot of chit chat before we said, "see ya tomorrow". It can be very annoying when someone wants to chit chat when I had a lot of work to complete before going home, and there was a very sneaky girl who pretended to be visiting my desk, but was snooping, she would run and start rumors or tell the boss something to upset her. After a while we knew she was trouble, most people ignored her. There's always one in every office!