Vintner's Collective is a multi-winery tasting room specializing in wines from small producers. There are two tasting options, The Vintner, which has a pouring fee of $15 to taste a selection of four wines ($7.50 for Napa locals) and the "Luxe", which has a $25 pouring fee that includes the above, plus three additional wines of limited availability and exceptional notoriety. Selections change daily.
This is the best place in Downtown Napa to taste wine. They are the Downtown tasting room for 15 or 20 different wineries, so you get the opportunity to try a number of different styles all in one place. All of the producers are small production boutique wineries.
The staff was knowledgeable and friendly, ask for Andy Renda, he knows a lot about where each wine comes from and how the wines are produced. They also offer monthly meet the winemaker parties in their upstairs function room.