In the last century, grapes fell on hard times and into the mixed company of tragic literary figures, musical raisins, and a giant purple gorilla in ill-fitting clothing. Grow the grape's self-confidence with today's Groupon: for $350, you get a six-hour wine-country tour for up to 10 people from Mr. Zin's Wine Tours & Limousine Service (a $714 value). All guests may be picked up anywhere within 100 miles of Sonoma and while this Groupon includes fuel, tax, and driver fees, it does not include any food or tasting costs incurred during trips.

Mr. Zin's Wine Tours safely chauffeurs scores of oenophiles on tasting treks through Napa, Sonoma, Dry Creek, and Russian River valleys in a roomy, 120-inch limousine. Coast carefree on the roads of wine country with nine of your closest friends, as you recline on leather seats, drink from curvy glasses, and repeatedly toast one another for no reason. All tours nudge novice or seasoned sippers into exploring their choice of more than 500 wineries in stately Napa, or the charming, less commercial grape havens of Sonoma. Revelers may procure their own tasting itinerary or enlist Mr. Zin's local expertise to plot a tour based on wine preferences, atmosphere, and your tolerance for purple lips.

Between sips of vino, stop for lunch at a rustic, farm-friendly café or rove through the romantic caves of Schramsberg Vineyards, where signature sparkling wines tickle tongues with airy sweetness. All of Mr. Zin's excursions are optimal outings for thirsty lady friends, co-ed book clubs, and leagues of nations.