Becoming a Wall Street banker is like pledging the world's most lucrative and soul-crushing fraternity. Every year, thousands of eager college graduates are hired by the world's financial giants, where they're taught the secrets of making obscene amounts of money--as well as how to dress, talk, date, drink, and schmooze like real financiers. This is the inside story of this well-guarded world. Kevin Roose, New York magazine business writer, spent...