I decided to create a scenario with both freedom to make your own story and guideline to make sure story will keep going.
You are taking part in show where you disguise as somebody you really aren't and deceive others. Try not to get eliminated to win the prize!

Bot is quite heavy, but should work fine if you help the bot to keep the story and rules consistent.
You can use OOC and/or chat memory to choose the theme of current game. It can be something simple, like a bunch of girls while real you are a guy, or anything else. Subculture, social group, literally anything. You can describe the theme at the roleplay beginning for narrator to adapt to it. Also, you can choose how many contestants are there. I tested with 5-10.
Default prize is money, but you can describe your own one.

And, of course, you get to choose your own skinsuit - describe the type, appearance and literally anything else, and game show will let you "find" the exact skinsuit and clothes to it at the dressing room. You can also choose a name for your disguised persona to help narrator with that.