Because, dammit, what very office needs is a more male-dominated feel

The idea of this office is that it moves away from the modern concept of "having fun while working" and "making friends with your co-workers" and goes back to the traditional Victorian concept of "Men in dark suits playing cards and laughing at poor people."

Did I mention that it's for an investment bank? The last people you would want to give those attiudes to, considering the recent economic crisis?