With its lavish four-day swirl of parties, wine tastings, dinners, and auctions, you might say the Napa auction is the world's most soigné charity wine event. But wine labels, not sneaker labels, are the prevailing source of the famous names at this affair. You may see Bob Mondavi talking animatedly about the role of wine in a healthy lifestyle, or Robert Sinskey hosting a luncheon in the caves dug into the rocky hill behind his winery. I've heard John Trefethen waxing enthusiastic about walnuts and wine, and Jack Cakebread proudly describing the culinary riches at his annual American Harvest Festival.

Though most of the crowd is affluent—technology executives, restaurateurs, and entertainment moguls—the event also draws schoolteachers, bank tellers, and the occasional basketball superstar. Many never raise a paddle to bid, but all share one common bond: They love wine, and especially the romance of wine. The 50-year-old Napa Valley Vintners Association has no shortage of romantic settings: rolling vineyards, ivy-clad wineries, old stone caves, enchanting modern ones. All the fun doesn't come cheap, though. A complete Wine Auc-tion package costs $1,000 per person. It gives you access to all the events (you'll have to pick and choose among those that overlap) and a bidding paddle.

for most events, the dress is casual chic for this mainly well-heeled crowd. Some of the evening events, such as Far Niente Winery's dinner, are black-tie, and a few, like the hot tub party thrown by Frog's Leap Winery a few seasons ago, are casual enough for bathing suits.

Over its 19-year history, the auction has raised some $20 million for medical and counseling services for farmworkers, low-income families and expectant mothers, women and children at risk of abuse, and people living with AIDS. Proceeds also go toward a Napa Valley Health Care Fund (totaling more than $8 million), which will provide a secure yearly endowment for the future health care of financially strapped valley workers and residents.

Each year a theme is set for the auction. Last year's was "Sentimental Journey," a trip back through time to the beginnings of winemaking. The focus was on the years after World War II when a handful of wineries—Charles Krug, Beringer, Louis M. Martini, Inglenook, Freemark Abbey, Beaulieu, Christian Brothers, and Mondavi—made most of the wine and laid the foundation for the resurgence of a wine industry that Prohibition had nearly destroyed. "Kaleidoscope 2000," the theme for this year's event (June 1-4) celebrates the unique role glass has played over centuries of fine winemaking, both as containers for the wine and as drinking vessels.

Two silent auctions, the barrel and private donor auctions, open the event. At the barrel tasting at Silverado Vineyards, guests sample wine from dozens of barrels of unreleased wines (mostly cabernet sauvignon) from the valley's top producers—wineries like Staglin, Pine Ridge, St. Clement, Shafer, and Sequoia Grove, among many others. Auction-goers then place bids for up to a maximum of 10 case lots.

This event calls for careful pacing—many people swirl, sniff, taste, and spit, rather than drink. Barrel auction bids are posted, with the final bids made on Saturday. Last year's top barrel auction bid was $161,950 for 10 cases of Staglin Family Vineyards Auction Reserve Cabernet Sauvignon—about $1,350 a bottle! A consortium, Dee Lincoln of Del Frisco's Steak House in Dallas and four other individuals, made the winning bid.

Private donor lots are also sold at silent auction. Donors offer rare and well-aged wines made by Napa Valley vintners. Last year, Joe and Eileen Small of Virginia Beach, Va., put up 33 bottles of Diamond Creek Vineyards Cabernet Sauvignon of vintages from 1977 to 1994. The high bid was $41,000—an astounding $1,242 a bottle.

With Napa's regional gastronomy ranking among the world's best, food plays a strong supporting role at the auction. Attendees sample specialties from the valley's restaurants and food businesses. In past years, Thomas Keller of the French Laundry offered crispy waffle-like cornets filled with salmon tartare; Bob Hurley of the Napa Valley Grille grilled quail; Gordons' Cafe filled focaccia with mozzarella; and dozens of stands offered high-caliber nibbles.

This noshing is just the start. Lavish party lunches and winery dinners created by some of the best chefs in the country, usually followed by music and dancing, go on for the entire Wine Auction. Last year, Beringer Vineyards imported chef Charlie Trotter from Chicago and transformed the winery's Hudson House into a dimly lit, atmospheric supper club. (Charlie Trotter's was recently voted "The Best Restaurant in the World for Food and Wine" by the Wine Spectator's readers.) Trotter's eight courses included a ragout of duck confit, oysters, pig's feet with a 1994 Beringer chardonnay, squab breast with black trumpet mushrooms with the winery's 1994 Howell Mountain merlot, and grilled loin of lamb, pickled tongue, and braised shank with Beringer's 1994 Private Reserve cabernet sauvignon.

dozens of wineries offered special dinners. Long Meadow Ranch featured music by Dimitri Matheny who played the jazz flügelhorn. Quintessa Winery put on a huge display of fireworks. And at Niebaum-Coppola Estate Winery, Francis Coppola put on an extravagant Italian dinner "fit for Don Corleone himself," according to the invitation. Chef Reed Hearon of San Francisco's Rose Pistola restaurant made grilled octopus with lemon, rôti of milk-fed lamb, and testarole with pesto, among other courses. The featured wine was Niebaum-Coppola 1979 Rubicon.

The lots that go up for bids at the live auction, held at Meadowood Resort in St. Helena, are the stuff oenophiles dream about. And the auctioneering itself can be an event. Last year, as auction fever neared its crescendo, actor and comedian Robin Williams—a local resident who owns a vineyard—took the microphone. He shocked the crowd with some of his manic profanity, then brought the house down by announcing that a white Land Rover (this crowd's vehicle of choice) had left its lights on in the parking lot. He did the job, though. When the bidding slowed, he raised it with $50,000 of his own money, which drove bidding to new highs.

"Robin was so funny and the dollars go for such a great cause," said Ronald Kuhn of Chicago, the day's top bidder at $130,000. For his money, Kuhn won for himself and three guests 11 days and nights of recreation in the Napa Valley, at the sumptuous Kea Lani Hotel in Maui, and on the slopes in Vail, Colo.—plus 20 magnums of wine. When the dust settled, the live auction alone had cleared more than $4 million.