LAS VEGAS — The last person to be banned for life from baseball was having a pretty good day, with a steady stream of fans and customers dropping by his table just off the casino floor at the Mandalay Bay resort for a picture, an autograph and a few words. Signing things and chatting with people is what Pete Rose does for a living, and judging by the wad of bills he was struggling to get a rubber band around, it pays well. Alex Rodriguez might take note, should he be banned from baseball, too, and lose out on the remainder of his $275 million contract.