I think the tour at Mondavi is good for non-winos as it covers the overall basics from wine-growing to wine-making and the there are some interesting stories along the way to keep them entertained. It's on a level that anyone can understand.
Gman - I wouldn't necessarily shy away from the appointment route. It's not at all unusual during summer tourist season to have a mix of wino and non-wino at an appointment. I get those type of requests all the time. I think if you just let the appointment know in advance there are a few wine 'likers' with you you'll be fine.
Originally posted by flop: Take them up to Pride. It's a free tour that goes through the caves and the vineyards and often has barrel samples. Even non-winos will enjoy the experience and the views that are up there.
Go a little north to Boonville, kick around the shops downtown, practice your Boontling (wacky local language), and go to Anderson Valley Brewing Company for a tasting and a round of disk golf on AVBC's tough on-site course.
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