Everything about casino design, from curving architecture, to ergonomic seat design, to addictive slot machine algorithms, has been tested and refined to extract as much of a patron's net worth as possible. From: Brad Plumer's article for Vox, "Slot-machine science":
One surprising example are the curving hallways around the property. Many casinos try to avoid making you ever have to turn at a 90° angle. As Natasha Dow Schüll explains in her fascinating book, Addiction By Design: Machine Gambling in Las Vegas, a right-angle turn forces people to call upon the decision-making parts of their brain — to stop and reflect on what they're doing. "Casinos don't want that," Schüll told me. "They want to curve you gently to where they want you to go."