While a massive headache for local residents, the strike could also have national consequences if it extends to next Tuesday.
They're demanding residual pay and safer conditions as games become more elaborate and lucrative.
Workers at the Trump Taj Mahal in Atlantic City are on strike and the casino threatens to shut down.
The unions represent workers in the wireline business, which is shrinking.
"Effectively, the district is bankrupt," said one former Chicago schools chief.