I rate casinos on my ability to walk out with more...

I rate casinos on my ability to walk out with more money than I came with. I've been going here for 10 years now, and am finding it increasingly harder to do this. Come guys! $1,000 every 10 outings or so would be great. You don't have to take ALL my money EVERY time I go there. Where is the 80% minimum pay out? I don't see it...