The rule here is business casual, although it is not rigorously enforced. If you wish to dine, drink a cocktail or visit one of the nightlife venues, then you will need to dress a little smarter. The premises hosts a huge and eclectic collection of modern art, spread out through the casino, bars and restaurants on site. The Palms is about much more than the casino, however. Especially during the day, most visitors can be seen wearing very casual attire.
If you are visiting purely for the gaming tables, then just about anything goes.
Like the majority of popular casinos in Las Vegas, the casino at the Palms resort does little in the way of enforcing any kind of dress code.