Newfoundland Atari Owners (N.At.O.)
Nova Scotia (NSACUG)
Montreal (Great information)
National Capital Atari User Group (NCAUG)
Toronto Atari Federation (TAF)
Hamilton Burlington Oakville (HBO-AUG)
Winnipeg (STUG)
Calgary Atari Computer Enthusuast (CACE)
Edmonton Atari Computer Hobbists (EACH)

Austin Atari Computer Enthisiasts(AACE: Austin Texas)
Atari Bay Area Computer Users Society(Abacus: SF, CA)
Atari Boise User Group
Atari Users of North Texas
Cleveland
Houston Atari Computer Entuhusiasts
Portland Atari Club
South Shore Atari Group(SSAG: Boston)
Sacramento's Total Atari Resource
Yolo Atari Club

Atari Programmers User Group (UK)
Logic User Group (UK)

Around the World

A4 Atari Club (Belgium)
FaST Club (Nottingham, UK)
Melbourne Atari Computer Club (M.A.C.E.: Melbourne, Au)
SAK (Sweeden)
Scotlands TOS Atari Group (STAG: Scotland)
SON CLUB ATARI (France)
Tariland Computer Club (New Zealand)
Wessex Atari Group (WAG: Wessex, UK)

Let me know...