If that is the Indian Casino one ...
The guests will complain about the heat ... so ... put lots of drink stores and some hat stores .. and canopies over areas they may sit or stand a long time to keep some of that burning heat off their head. I ended up with it in the mid 80s just in time for the completion .. Just loaded up the game now and it is at 79%. Mine did hover between 65% to 75% for ages .. but benches ( for resting ) and drinks ( for drinking - dah ) and hats and canopies (keep the sun off the head).
I ended up with:
16 Drink Stores scattered around where they were spending the most time
7 food stores - the default ones, I didn't add any others
3 hat stores scattered around where space permitted... each hat store gets a 3k profit a year
If you look at these thoughts by the end of gold ... the 'scorching' thought was approaching if not over 40% .. the drinks and hats helped there .. and as you see their energy is waning again so could explain the drop down to 79% as I didn't put tons of benches in .. just where they were clumping. I also put in tables at the big road junctions for a quick rest and chat before moving on .. I swear some of them collapsed in them the moment I put them down rofl.