Paying for electricity

I stayed for a couple days at a small independent campground in Pennsylvania a couple years ago. At Chek Inn, they told us it was an extra two dollars per night if we wanted to use our air conditioning. It was hot, so I said OK and paid up the extra six dollars for the three nights. As soon as we got our site set up, I switched on the air conditioning and immediately noticed it did not sound right. I took out my digital multimeter from my truck and found 98 Volts At the 20 amp outlet in the pedestal while my trailer was running off of the 30 amp plug. Pretty full campground... One of the young man that worked for the campground saw me, came over and apologized, explaining it’s a very old campground with a very old electric service. We made it Through that weekend without using the air-conditioner, but it wasn’t pleasant.