I was playing today on the wii version, blackhand edtion i think. Anyway i found a way to get full extortion payments from bars, bakeries, clubs and hotels and also the most money from the racket boss without needing any negociation points. First enter the es and start to extort the front owner but stop as soon as the money starts to add up, then go to the racket boss and push him over the edge whilse also noting the highest amount he will pay before fighting back. Return to the front owner and the red in their meter will not disappear until you "take over" the business, after that just walk outside and then back to the racket boss and extort him up to the amount you noted earlier. Dont forget about the weak spot bonus, the wii is the only console i know for sure that it works on, and if you cant get to the racket boss before you taake over the front it won't work.