The Atlanta Lawn Tennis Association (ALTA) is a non-profit organization devoted to the development of tennis for recreation and physical fitness and is pledged to maintain the rules of play and high standard of sportsmanship. The primary function of ALTA is scheduling league play for adult teams and junior teams in the five-county metro area. A facility annexation program was developed in 1988 to include qualifying facilities in counties adjacent to the metro counties. 

   There are services on the web that let you manage an ALTA team. The most used one is: http://www.netlineup.com/. This website is a great ALTA tennis team management tool.

ALTA History
  The Atlanta Lawn Tennis Association (ALTA) was first registered with the United States Lawn Tennis Association (the USTA today) in 1934 by a group of local tennis enthusiasts wanting to promote tournaments and raise money to support junior tennis.
  Tennis activity during that time centered on play in the citymaintained parks at Piedmont, Grant, Candler, Peters, Oakland City and West End. A few clubs, such as Northside Tennis Club at Juniper and Ponce de Leon, Kennolia Tennis Club on Kennolia Drive, West End Club on Donnelley Avenue, and Atlanta Tennis Club at Argonne and Ponce de Leon also offered tennis facilities to the public.
  From the time of its formation until 1971, the Atlanta Lawn Tennis Association had about fifty members whose primary interest was grass roots, junior tennis and tournament promotion. League play as we know it today did not exist anywhere. In 1970, Charlie Cox was elected President of ALTA and hit upon the concept of league play as a way to attract new members in order to have the volunteers necessary to bring major tournaments to Atlanta. Since league play was begun in 1971 with a membership of 900, the organization has grown to more than 80,000 members and year-round league play. Net News, the organization’s magazine, is published six times a year; ALTA promotes seven tournaments a year and encourages junior development by providing the Junior Challenge Ladder. Buying its own building in 1995, setting up The ALTA Foundation as a charitable arm of ALTA, and acquiring up-to-date computer equipment have prepared ALTA for the 21st century.

Enough of reading! Please come and join us at ALTA. If you're looking for a team, use this ALTA team referral tool.