If they have the two-column/gantry style cable machine and you’re willing to BYO bar, you could add removable cable attachment points to each end with common pipe and cable hardware.

For example, on each end of your bar, you could slide on a shaft collar like this

But replace the set screw with a shallow eyebolt like this

Then attach cables of lower-inside pulleys to the eyebolts at each end of your bar, and test.

It won’t replicate the dynamics of plates but should let you find the correct angle of resistance into the floor and maintain your form while training with cables.