Factual error: The traffic lights back then were dark brown decorative posts with only a red and green light, and they were firmly attached to the sidewalk. The ones in the movie came much later (but before 1993, obviously).
Continuity mistake: 20 minutes into the movie, the detectives bring Calogero out to the street to identify who he saw with the gun. You see Calogero walk by Slick, who has his hands around a parking meter with his shirt open and unbuttoned. In the next shot, you see Slick again, but now his shirt is buttoned up.
Other mistake: When Lorenzo is driving the bus with C, Lorenzo has a jacket uniform with a plate in his shoulder. The identification number of the bus is inverted.
Other mistake: At the beginning of the film when "C" witnesses Sonny shooting the guy over a parking spot, Lorenzo quickly shuffles C upstairs. They are in their apartment not more than 10/15 seconds when a detective knocks on their door. There's no way the police would have shown up that quickly, let alone the detectives.
Visible crew/equipment: In the scene where C drives Sonny's car up to meet his date, at the moment he puts the car in park, you can see the reflection of the boom microphone in the bottom left corner of the windshield.
Chosen answer: They are playing a version of Craps called Street Craps or Ghetto Craps. You can get information about the rules for this game here: http://www.craps.net/rules/street-craps.html.
raywest ★