In the FBI file on Marcello he's talking to his brother and he makes a comment to his brother, laughing, about how Lombardo ran more scams/shakesdowns than anyone, I forget the exact wording.
I don't believe the thing about Bananas either. It sounds like a Chuck Palanchuk story. Who knows if that is even physiologically possible.
I wonder how much gambling there still is in Chinatown. Did you read When Corruption Was King? Talks a lot about the Outfit's relationship to the Chinese in Chinatown, various shady merchant's associations, etc.
The Chinese are huge gamblers. I would guess there is still some action over there.