A street gang of the Shambles
Bronn Helmcleaver hired them as muscle to attempt to intimidate the Watch officers who were investigating the disappearance of Kelera into dropping the investigation. It didn’t go well. The Watch put up a fight, chased Bronn away, and arrested a majority of the gang. However, Sergeant Litman declined to press charges but instead made an arrangement with the Grubs that is somewhere between probation and confidential informant status. Basically, they need to not cause trouble, but there’s gold for the taking if they report further contact from Bronn and/or assist in any future Watch investigations.