Even with the new Boprgata Casino, revenue for the Atlatic City Casinos wqas dwon for the month of September. September gross gambling revenue at the dozen casinos declined 0.6 percent, to $368.9 million, compared to the same month last year, when there was no Borgata. …Revenue at the 11 casinos open last year declined 11.9 percent. Every casino open a year ago reported a revenue decline, ranging from 3.6 percent at Caesars to 22.8 percent at Tropicana. View the official September Revenues from PressofAtlanticCity.com.