My experience is you should NEVER schedule special shows. The reason is camming is temperamental and you never know how much money there will be on the site and in your room in a particular day. And it doesn't matter how amazing your schedule show is, if there isn't money you won't make any and you will blame yourself, your show, and your viewers for not engaging when you could have failed equally doing your bread and butter routine.
Instead of scheduling a show, keep a handful of ideas in the back burner, things you could do today if you wanted to, if you find the vibe is right. So you start your show with no expectations and you keep a few different options to choose from once you figure out what kind of day it will be.
Then there is also the fact that some shows will make more money than others because of their nature and others won't make as much but they have other upsides: they make you look cool, differentiate you from the rest, they make your members respect you more. And so doing an artistic show like body painting or playing piano might not create as much money in the moment but they will help create a special image about you so people will remember you and next time they visit you, on a bread and butter show they will tip you because they remember.
So... I don't do artistic shows but I do games sometimes, which is similar and I don't schedule them, I keep them on the back burner for slow days. If I log on and there is not much going on I will bring out the games and conversation. And this is what I would recommend doing with artistic or offbeat shows.