Inside a conference room at a Sheraton Hotel in Miami, Bob Calkin paces in front of a small stage, holding a microphone. The 50-year-old Los Angeles cannabis hustler with '80s rock-band hair flies around the United States, charging folks $299 a head to learn how to make a fortune dealing po — sorry, "dispensing medicine." Before 9 o'clock on a Saturday morning, 150 wannabe marijuana barons have filed in for a ten-hour crash course put on by Calkin's company, Cannabis Career Institute. He's just raked in $45,000... More >>>