How do I cope with office life when there is no work?

I work in corporate finance and for the past four years routinely worked 14-hour days. Now work has dried up and we are all sitting around pretending to be busy and failing to drum up business. I am finding the boredom far more stressful than I ever found the work. I don't know how I should behave. I am tempted to take three-hour lunches with friends, then go home early to learn salsa dancing. But would that be begging to be first in line when the axe inevitably falls?

Investment banker, male, 27

Being bored at work is painful; being bored as a prelude to being fired is torture.