A comprehensive list can be found at http://www.aadallas.org/index.php?option=com_wrapper&Itemid=57. There you can also find maps, a table of meeting types and locations, and the distance from zip code 75201 (or another appropriate zip code). The meetings include Downtown Nooners, Central Expressway Group, Live and Let Live, and the 24 Hour Club. Basically these would be within walking distance, less than a mile.
There are other young people attending meetings in the Park Cities area at: Preston Group, Highland Park Methodist Church, and Park Cities Presbyterian.