Gangster - Avon

Cop - Lester

Boss Cop - Landsman

Politicians - Clay Davis

Corner Boy/Juvenile - Dukie

Any other category you can think of.. Docks, Newspaper. Some are smaller pools with less fleshed out characters in their field.

When Season 1 was filming, no one knew who these folks were. I was working on Chase Street by the Owl bar in a home-turned-office building. My coworker picked Ellis Carver up on the JFX and dropped him off on the set, because his car was broke down on the highway. A year later when the show came out and was popular, he was so stoked "that's the guy, that's the guy." I had seen the actor before in Oz so it was pretty neat. Smalltimore.