The TheoRgs are known for being amongst the biggest, toughest, and most generally unpleasant sentients in the galaxy. And this is their nightclub.
In addition to the Thieves' Guilds, there is a hierarchy that all thieves are part of. Rank is based on skill, and can be raised or lowered at any time. The Queen of Thieves, the greatest living thief in the world, is the ruler. Guildmasters answer only to her, and she answers to no one at all.