Strange habits in Greece

Well now let me share you some information about strange habits in Greece
Something that really called my attention was that in Greece men hold rosaries and worry beads in their hads only to kill the time and not exactly for religious facts.

Another is that pople don't eat alone in public places in Greece like taverns, pubs, restaurants,etc. So if you go alone, the waiter won't serve you ..... That's so strange, what do you think ?