Most of the larger hotels in Las Vegas have sports-book operations, which look a lot like commodities-futures trading boards. In some, almost as large as theaters, you can sit comfortably, occasionally in recliners and sometimes with your own video screen, and watch ball games, fights, and, at some casinos, horse races on huge TV screens. To add to your enjoyment, there's usually a deli/bar nearby that serves sandwiches, hot dogs, soft drinks, and beer. As a matter of fact, some of the best sandwiches in Las Vegas are served next to the sports books. Sports books take bets on virtually every sport (and not just who'll win, but what the final score will be, who'll be first to hit a home run, who'll be MVP, who'll wear red shoes, you name it). They are best during important playoff games or big horse races, when everyone in the place is watching the same event -- shrieking, shouting, and moaning, sometimes in unison. Joining in with a cheap bet (so you feel like you, too, have a personal stake in the matter) makes for bargain entertainment.