I popped into vinovenue this past weekend, and was intrigued by the concept.
Basically, it is a retail shop, but you can try every wine they have for sale at their self-dispensing wine stations. You have to buy a tasting card in $10, $20, or $40 increments, and most one-ounce tastes cost between $1-3 (for some of the REALLY expensive wines, the tastes are more expensive). You just stick your card into whatever station in which the wine you want to try is located, and then you push the button on the appropriate wine. And voila, the machine dispenses a one-ounce tasting into your glass.
It was an interesting, fun concept, and the munchies they provided were pretty good (there were crackers, a trail mix heavy on the peanuts and M&M's, and an asian cracker one). There is also a very small charcuterie section in their fridge with cheese, pickles, and such.
They are right next door to AG Ferrari by SF MOMA.
686 Mission @3rd
P.S. AG Ferrari has a "happy hour discount" daily from 4 p.m. on whereby their usual $3 glass of wine is $2)