Paul McGuire was at his computer, enjoying one last hurrah on PartyPoker, a site that had pledged to kick off all U.S. users as soon as the law left President Bush’s desk. "It was kind of like that last party before summer ends when you’ve got to go back to school," says McGuire, a 34-year-old New Yorker and author of the popular "Tao of Poker" blog. "They were playing loose because it was the last night." Maybe for some. Not McGuire, whose online handle is "Dr. Pauly." At 11 p.m., he simply closed down his PartyPoker account, withdrawing thousands of dollars in winnings accumulated in recent weeks. He later wired the funds to an offshore account with NETeller, an Internet bank registered in the Isle of Man, and opened new accounts with two other poker sites — both of them privately owned.