They claim the city could actually lose up to a $500 million if video poker machines are allowed to expand across the city.
The Illinois legislature passed the video gaming act last spring in an effort to generate revenue for a statewide capital improvements bill.
Those opposed to video gambling say the city would most likely spend more to fight an increase in crime.
"The city is not going to be able to be able to balance its budget on video poker. They may take in $10 to $15 million, but they are gonna spend more than that on police overtime just to manage all the problems that video poker will cause," said Fr. Michael Pfleger, St. Sabina Church.
Sixty-nine communities across the state have already voted to ban video poker.