Just seeing this photo for the first time. Not sure if this has been determined here but number 5 is Nicky Palermo and the event is probably the plumber's picnic that he hosted back in those days. I believe one of his daughters married an Accardo. He was also father-in-law to Frankie DeLegge Sr. Palermo ran a burglery crew out of Melrose Park. A very reliable source told me that at one point JB was talked out of whacking Palermo. Don't know what Nicky did to piss Tony off.