The Guild of Nightwatchmen

  Granted their charter by the Directorship in order to curb the growth of private armies of bodyguards being raised by Greyhawk's wealthier citizens and to avoid spending further civic funds on expanding the City Watch to maintain law and order on the streets, the Guild of Nightwatchmen is a privately funded body providing a variety of static security, street patrols and escort services.
  Recruits to the Nightwatchmen's Guild are examined for membership by a panel of senior Nightwatchmen.  The guild employs several priests of St. Cuthbert, (the guild's patron deity; hence the members' preference for cudgels while on duty) specifically to cast healing spells, to cast Know Alignment at interviews and to maintain the guild shrine.

Guilds of Greyhawk