Car shows- Something does not make sense

I went to one at my local Memorial park this past Memorial day. There wasn't a charge to get in, but food and drinks were sold etc. I'm not sure if every car paid to enter, but there was an awards ceremony for the cars and trophies. if you wanted to enter your car to be judged I'm sure there was a fee. I drove my Fox body and parked it in the parking area. It was the only one there and I found that odd.