The zhentarim are an organization that operates out of Zhentil Keep. They
are an evil group that disrupts trade all the way across the Kingdoms. The
Zhentarim is said to be openly ruled by Manshoon, Fzoul and Semmenon. They
are said to pay well but make a mistake and expect to find yourself floating
face down in the Zhentil Keep Sewers.
Note that you cannot have an alt character in the Harpers, the Knights
of Myth Drannor, the spies guild, the night masks, the shadow thieves, and the
Waterdeep Watch if you have a Zhent. This includes any form of spying or
interaction with these organisations.