Is there a central tasting room where one can sample wines from all the wineries in the Valle?
There used to be a wine bar next door to Papa's & Beer, but I am unsure if it is still there, they carried wines from all over the valle.
Santo Tomas has a wine tasting room in town and just outside of town (a $1.50usd UBER ride), LA Cetto has a lovely wine tasting room.
There are alot of beer tasting rooms in Ensenada, but I realize that is off-topic.
Have a beautiful visit!
There are several wines available to sample at the cheese shop at the traffic light in San Antonio de las Minas (it's called Cremería Los Globos). It's not maybe the most relaxing spot but it's not bad AND you get to taste cheese too.