Wine in a Bottle.com
"Wine Information and Wine Talk"
   A good place to taste wine is at a winery. This is where wine etiquette is readily observable. Most wineries will have knowledgeable staff to assist you. Don’t hesitate to let them know you’re a new wine drinker and are trying to determine what you like and what you don’t like. The staff will be more than happy to explain the different wines and styles.
   While wine tasting, it is perfectly acceptable to discard wine you don’t like. All tasting rooms will supply a receptacle for you to pour the wine you don’t care for into. It’s also acceptable to ask for another small taste of a wine you weren’t able to completely understand the first time.
   It is not good wine etiquette, however, to ask for a second pour on every wine. If you find a wine you like, it’s in much better taste to purchase a full glass. Better yet purchase a bottle. When you do this any fee that was charged for the tasting will generally be waived.