Atlantic city’s casinos would be able to continue to allow gamblers to smoke on the casino floor under a new bill that would impose additional restrictions. State Sen. John Burzichelli introduced a bill Monday that would keep the current 25% limit of the casino floor on which smoking can occur.But it would allow smoking in unenclosed areas of the casino floor that contain slot machines and are designated as smoking areas that are more than 15 feet away from table games staffed by live dealers.