|The Legitimate Businessman's Social Club
The Legitimate Businessman's Social Club is the headquarters of the Springfield Mafia.
The club is located in the basement of a building, and Bart Simpson was briefly employed there as a bartender. While employed as a bartender, Bart made what Fat Tony described as one of the best Manhattan cocktails, which landed Fat Tony in hot water when Bart did not show up for work on a day Fat Tony had invited a rival mafia Don to try one of Bart's Manhattans (Bart received Detention that day, and thus was unable to make it).
It was also used when making "business dealings" with Mayor Quimby, including the distribution of Rat's milk to the schools.