I know this is just anecdotal, but my experience is quite the opposite.  Some of my closest friends are friends I made at work.  I was in their weddings.<p>Sure we drift apart when we no longer work together, because we don&#x27;t see each other every day, but we&#x27;re drifting apart from being very close.  I&#x27;m still just as &quot;in touch&quot; with them as I am with my other friends.