The Assassins’ Guild is a subset of the Slayers’ Brotherhood.
The Guild of the Grain Merchants is indubitably one of Lankhmar’s wealthiest and most powerful guilds as the grain trade is Lankhmar’s chiefest source of wealth. They were known to trick local farmers out of their plots of land and form vast areas of slave-worked farmland.
The Pimps' Guild disdains freelance females.
Mercenaries for hire belong to the Slayers’ Brotherhood in Lankhmar. The Brotherhood also contains the Assassins’ Guild among it’s members.
The Thieves’ Guild sometimes hires out women from the Whores’ Guild by the half-hour when they need females for a mission.