A secret society (non theives) that bands together out of mutual need for protection - like Braegan D'aerth from Salvatore's novels. The male drow that are houseless band together for wealth and power, and a home.

CF's version is not drow only, any race would benefit from having a cabal that you don't have to be cookie cutter to join, being more "RP open". You can be good, evil, whatever, you just swear an oath to brotherhood and the only punishment is death if you break your oaths. Maybe you donate so much gear or when a brother requests help regearing you must aid them. I'd LOVE this, and if anyone f'cks with a brother you all gang up to seek justice.

All cabals do the regear thing - but having good/evils that speak with eachother gives room for multiple angle RP that is not surrounded by someone's death, possible conversions for faith based classes - I think there's a real boon here to be explored.