1. Bring a second person with me to the range. OR ...
2. Bring one of my own firearms to the range with me.
Several ranges in my area adhere to the same policy.
I am a little curious here, don't you normally bring another gun or 2 to shoot when you go? I would of at least had my range bag with glasses, ear protection, targets etc... not that would of did any good because of rule #2