On this particular evening, all the world’s most lethal blackjack players have taken the night off. And while casino blackjack pits don’t show any noticeable dips in activity, surveillance and security personnel can probably take it a little easy tonight. Poker games rev up and craps tables teem with action. Various iterations of Cirque du Soleil shows go off precisely as anticipated. Slot machines clang from one end of the Strip to the other. It seems like a typical Saturday night in Las Vegas.