With its sprawling 20-acre Asian-themed campus, the Four Seasons Westlake Village is not just a hotel with a first-class spa.

It's a luxury wellness resort, a new concept in the lodging industry that combines traditional spa indulgence with health and wellness packages all under one extravagant roof.

Opened in November, the property houses the Four Seasons hotel chain's largest spa and the California WellBeing Institute, a sister facility that offers medical consultations and holistic life workshops ranging from a $3,400 executive physical to high-end lessons in how to eat nutritiously.

In coupling the wellness clinic with an opulent spa and oversize hotel, the Four Seasons hopes to capture a well-heeled leisure clientele along with its bread-and-butter corporate business travelers, said Shelby Taylor, a spokeswoman for Four Seasons.

The resort is set up for corporate groups and also attracts lots of individual businesspeople because it's located within a mile or so of Countrywide Financial and sits right across the street from the headquarters of Dole Food Co.

Dole chief executive David Murdock owns the property, and he created the idea for the WellBeing Institute after losing his third wife to cancer in the 1980s. Murdock also owns Hawaii's tiniest island, Lanai, the site of the next WellBeing Institute, which should open at either the Four Seasons at Manele Bay, or the Four Seasons Lodge at Koele in 2010, said David Miller, director of sales and marketing at the Institute.

The synergy of spa and medical clinic has produced some interesting services.

On the spa side, the hotel is throwing summer parties in the poolside cabanas where guests who pay an extra $75 can get feng shui hair consultations, reflexology instruction, a nutrition session with a dietitian from the WellBeing Institute, and Botox mini-treatments at an "attractive" additional price.

"We're transforming the pool into an evening spa lounge," said Taylor.

The first Summer Spa Soiree last month sold out with about 100 guests. Additional parties are planned for Aug. 15 and Sept. 19.

For its part, the WellBeing Institute is looking to expand its popular "life kitchen" workshops, where groups listen to a dietitian discussing how to eat healthfully, then they cook and eat a meal together in a special kitchen. The Institute has been doing a brisk business selling life kitchen experiences as a team-building exercise for companies doing off-site meetings at the resort, but it would like to appeal to more individuals as well.

"We're not getting a lot of people who are staying at the hotel, like a business traveler coming to a meeting at Countrywide," said Miller. "What we're trying to capture more is the business traveler."

Starting in July, guests checking in will get a daily sheet promoting activities at the Institute, such as free yoga classes.

The medical packages, which feature cutting-edge technologies such as a next-generation CAT scan machine that has yet to debut in hospitals, appeal more to day users who can afford to spend $4,000 on a preventive physical.

Miller claims there really is no direct competition with the Four Seasons Westlake Village, which he describes as a Mayo Clinic meets upscale Canyon Ranch - able to do full diagnostic testing of a patient and then finish them off with a Caviar Facial.

"We consider ourselves high medical, high luxury, but with the spa," said Miller.