Not surprisingly, a business built on getting many people to ignore the odds and spend a lot of money would be invested in ensuring that everything in the casino works toward that goal. And, it turns out, conventional wisdom doesn't work.

"If you think about it, the traditional layout doesn't make sense," Thomas told me. "People don't want to bet when they feel trapped, depressed or confused. That's not the mood you want." Instead, Wynn and Thomas proceeded on the assumption that people are more likely to make big, risky bets when they feel safe and relaxed. Instead of luring players into a web of slot machines that might cause anxiety, casinos should seduce them with a sense of grandeur. "People tend to embrace the characteristics of the room," Thomas said. "They feel glamorous in a glamorous space and rich in a rich space. And who doesn't want to feel rich?"
And so Casino Design Psychology: Top Secrets . 
The lavish design, which violates many traditional principles, got its name "playground design" because of David Crane's assessment of casino spaces, and ranked first among resorts that have the money to implement it.
In a 2009 study, "The impact of casino decor on emotions and gambling intentions . he five other design elements were tested for their influence on the visitors to the gaming venues and gaming design. The five variables were lighting, color, crowding, symmetry in placement, and spatial clustering. 484 and 84 players (241 of whom were male). The playground and game design were replicated by video, with five elements manipulated in the video. A total of 20 videos were produced, and both the playground and the playground had two versions of the design elements:

One playground and one play video were then shown to small groups of participants. Intentions from the enjoyment, recovery, and risk of gambling were measured using surveys.

Casinos with a playground were always more likely to encourage gambling, no matter what small design choices were made. On the other hand, bright colors and symmetry did affect gambling casino ratings. Ultimately, the study focused on reducing risky gambling behavior and concluded:
The results show that casinos that are consistent with gaming design are more susceptible to testable microdecor elements than casinos that are consistent with playground design. To reduce the propensity to gamble without reducing recovery or enjoyment, gaming design should include static lighting, a varied color scheme, grouping machines by theme, or a symmetrical layout. Favorable effects in playground design can be caused by static lighting or symmetrical layout. In both cases, women should be encouraged to gamble when the casino is crowded.