Vinnie's is a rather small bar establishment on the Third Island, Paper Thin City. The only buyable item is beer. At Vinnie's, you can get the job of Hitman. There appears to be a pool table and a Blackjack Dealer, though the pool table is just decoration. Vinnie's Goon can get you a Trophemon.
Vinnie's Muscle - Presumably another employee of Vinnie.
Shady Bartender - Sells you beer for $90.
Lizzy - A close friend of Vinnie's, since she's asking the person next to her whether to kill some Westside Gang members.
Duncan - Attracted to Lizzy. Nothing else.