The Ninth Circle

The Ninth Circle is a bar inside of Underworld Concourse which is in the Museum of History. The bar is owned by Ahzrukhal; it is rivals with another store in Underworld.

Here, you can buy a contract for a "slave" named Charon for 2,000 Bottle Caps (or 1,000 Bottle Caps if your Barter is high enough) from Ahzrukhal; you can also get the contract by killing Greta in Carol's Place for Ahzrukhal. Charon will follow you around and help you in combat.