Huerigers

You might do a search on this forum. There was a discussion a month or two ago - also mixed reviews.

The most famous neighborhood for heurigen in Vienna is Grinzing. It's easy to get there by public transport. I would save taxi for the way back. There are many heurigers there so it's hard to generalize about crowds, service, food etc. There is a little bit like festival atmosphere. The only thing I would dare to generalize is that wine is usually nothing much. But I drank worse (and of course better).
https://en.wikipedia.org/wiki/Heuriger

To foster a better understanding:
https://www.virtualvienna.net/heurigen/

First, the correct spelling is Heuriger (Heurigen is the plural). I point this out only as it may help with your research.

As the heurigen are located in the vineyards, it makes sense that they would be located on the outskirts of town. They are easily reachable by public transportation, however, and a taxi is not necessary.

Typically, people go to heurigen later in the afternoon/evening. It is not a lunch thing. Please avoid Grinzing as it is tourist central with giant busloads of people.

I personally like Stammersdorf, which is the end station of Tram 31. Many excellent and locally-visited heurigen along their Kellergasse. I also really like Nussdorf, which is the end station of Tram D.

My favorite day in Vienna is to take bus 38A to Kahlenberg for the excellent view of the city, walk down the mountain on Stadtwanderweg 1 stopping at Buschenschank Mayer am Nussberg (http://www.mayeramnussberg.at/en/home.html) (note - Buschenschank are heurigen without hot food) for wine and a nibble. Then continuing down the hill for dinner at either Feuerwehr Wagner or Schuebel-Auer. Check websites for opening days.

Heurigen do not typically serve beer, although the two I mention above do. Food is provided cafeteria style with drinks provided at the table by servers.

Here's an article about Stammersdorf - http://www.viennawurstelstand.com/article/stammersdorfer-kellergasse-a-guide-to-heurigen-hopping/

We had dinner at this Heuriger a couple of weeks ago:

http://www.pfarrplatz.at/en/heuriger/the-heurige.html

We had an 8:00 reservation and it was busy when we arrived but quieter when we left. Food and service were good though we were a couple of minutes late for our reservation and got a bit of a dirty look. We ordered off a menu which included some vegetarian options. Almost everyone seemed local. We took the D Tram from the stop near the Opera House (running every 5 -8 minutes) and it was approximately a 30 minute ride. We also took the tram back to our hotel and by later in the evening it was running about every 10-15 minutes. We saw no tourist buses or large groups.

We also stopped before dinner at another closeby Heuriger:

http://www.werner-welser.at/

This one was not as crowded, but equally as pleasant. We went on a Wednesday and there were musicians playing. We had a really fun conversation with our waitress which was started by our daughter commenting on her dirndl. We saw family pictures of holidays and special events and heard about customs re: dirndls and lederhosen. This also seemed to be a local crowd.