The New York Times has an article about business travelers who burn the midnight oil while away on business trips:
"A business trip is not about sleep," said Mr. Stevens, who spends the wee hours in his hotel's lobby or bar, mapping his strategy for the next day. "Nobody comes out of any business meeting and says, 'You did best today because you look freshest.' Clients couldn't care less if I am fresh as a daisy. They just want to know that when I or my team comes to the table, we've got a big idea."
Sleep deprivation eventually catches up with you:
On the other hand, he recalls the time he drifted off while walking down a street - and collided with a parking meter. On another occasion, the lead negotiator on his team fell asleep in midsentence.