On a recent Monday afternoon, Buffalo Bill’s — a Western-themed casino about 45 miles from the Strip at the California border — offers a glimpse of Las Vegas’ past. The place is hopping. A line to sign up for the players club snakes through the casino and toward the lobby. Nearby, people in shorts and flip-flops play slowly, pausing to gulp sodas and take in the crowd. In the food court, families and young couples take up most of the available seats, eating on the cheap amid kiddie rides and arcade games.