Bright, modern Italian chairs, designed by Paola Lenti, create a spacious mood for lounging. Free weights in the nightclub- like gym at The Bathhouse Spa. Water, incorporated into corridors and reflecting pools, adds depth to the slate walls and glass tile.

Though it is a unisex spa, the 15,000-square-foot Bathhouse in The Hotel at Mandalay Bay boasts that 40 percent of its clients are men. The facility, designed by Richardson Sadeki, a New York-based firm, incorporates a Zen-like atmosphere and appeals to male and female clients.

Chartreuse, lime green and orange are the accent colors carefully placed around the spa, infusing energy into a distinctively calm environment. Recessed lighting on the walls, ceilings and floors creates a cavernous mode, enabling visitors to feel alone in their private spa areas. A glass staircase delivers clients to 12 private treatment rooms, where Paul Newman, Keanu Reeves, Don King, Dante Hall and Sean Hayes, among others, have had massages and facials.

Clarissa Richardson, creative director for Richardson Sadeki, said the predominately male design team incorporated features they liked, ensuring that a male audience would be pleased. Masculine treatments were included in the spa's menu, like the men's facial, designed specifically to treat men's skin.

"Men's skin is different," said Lezlie Young, the spa director. "They shave every day and have different sensitivities. They don't want to leave smelling like roses so we use products that offer a clean, aftershave smell."

Young said that while most men come into the spa with wives or girlfriends, they don't offer couples treatments. And while the men are coming in with women, Young noted that the stigma associated with men going to spas has disappeared. "We have lots of manly men, lots of NFL players," said Natalie Mounier, a spokeswoman for Bathhouse.

Mounier said actor Vince Vaughn recently stopped by the Bathhouse for a Pumpkin Spice Facial. And while it's not the men's facial, she said it is still not feminine. Mounier noted that many of the treatments are geared toward men and women, so they focus on a spice smell that both genders will find relaxing and acceptable.