I was in Little Italy last week on a "mobtour" with a local guy who seemed to be pretty in the know. He pointed out a location right next to Petrosino Square (i think it was on Spring Street) as Al D'Arcos old social club.

Mulberry Street is of course a tourist trap. I think my kids makes a better spagetti bolognese than any of the restaurants there and none of them has yet reached the age of four. But its an interesting place to visit anyway cause of all the history that went down there.