Nearly everyone I know who went to Coachella stopped at one of the casinos at some point -- if not just to go to the bathroom or get some food.
I find it hard to believe that nobody succumbed the the pressure of the dings and the flashing lights to play some games of chance.
I do believe Courtney's claim, however. This is a girl who didn't even realize there was ever a "poker boom", so it's reasonable to assume that gambling is of zero interest to her. But the rest of you are still guilty until proven innocent.