The companies, which own eight of the city's 11 casinos, are asking for three-year contracts.
Local 54 President Bob McDevitt says he understands why the casinos are asking for wage freezes.
An economic downturn and new competition in Pennsylvania have taken a toll on casino revenue.
The union represents about 15,000 workers whose current five-year contract expires Sept. 15.
Information from: The Press of Atlantic City, http://www.pressofatlanticcity.com