Atlantic City really pumps out a lot of light pollution I'm about 18 miles away and the Eastern sky is very bright all night long. It depends on cloud cover though, sometimes its worse than others. But I can wander around the woods at midnight on a moonless night and see by the reflected sky light. I can see the milky way sometimes though. When I first moved here I thought it was really dark at night. But if you sit outside for a few minutes until your eyes get accustomed, there's a lot of light.
I'm surprised you saw so much from Atlantic City though, you were about 36 miles away. Just think about how much energy is wasted lighting literally thousands of square miles of the landscape through reflection.