Links below are dead online groups or spam collectors.  Stay clear of them.  For live groups go here.

http://groups.yahoo.com/group/looking_in_rapid_city

http://groups.yahoo.com/group/manymeninsouthdakota/

http://groups.yahoo.com/group/GayRALLY/ ----- dead yahoo group though the real group is still alive and well.

http://groups.yahoo.com/group/southdakotagaymalesclub/

http://groups.yahoo.com/group/Bi-MEN-DAKOTAS/