We’re a law firm. Time is billable. The client doesn’t pay for small talk. Every minute you spend away from your desk is a minute the firm isn’t making any money off your presence, even though you’re still using the office supplies, eating the muffins, drinking the coffee, consuming the oxygen, and adding to the wear and tear on the carpets. You’re overhead.  And if you’re not earning your keep, you shouldn’t be here.

Jeremy Blachman, Anonymous Lawyer 3 (2006).