I had a hard time believing it at first too, but maybe you guys are looking at it too stereotypically, with a meeting of all five bosses, and their bodyguards like in the 80's with Paul Castellano calling for meetings ect. Maybe it aint the bosses meeting per say, but representatives of families meeting. A trusted capo, the consigliere or the underboss. Perhaps they are meeting. The commission could still exist even though all the families aren't meeting at once. It could be that 2-3 families representatives meet at once, then at a different time others. There has to be solid lines of communication, is it really far fetched to believe that a handful of different guys from the different families can meet up at a random place to discuss issues, unnoticed, in a huge city with millions and millions of people?