There is a popular blog called
Ask A Manager where the author receives and responds to letters from both sides of the table. There is no shortage of content, in part because there is no shortage of interviewers who think they have come up with a cute twist on interviewing. You should write your question to the author and see if your letter gets published.
What you need to understand is that interviewing is exhausting and costly upfront. Candidates are often following multiple leads, often going through the application, first contact, scheduling, phone screening, and follow-up stages before meeting you in person, and even then they don't know how many candidates there are or where they are ranked among them or even if they are being considered seriously for the role.
They take time off from their current jobs or make arrangements for their kids to be picked up. They rehearse and dress up. They confirm their routes and show up way too early because they planned for the upper end of travel times. They pay for parking because they didn't want to be presumptuous. They do all this and they get "You are not the right fit at this time", and they do it all again, and they get "Best of luck in your search", and they do it all again.
Imagine you are one of them and your interviewer busts out a deck of cards and announces the game. Now imagine being rejected, not being good enough for the company that broke out a poker game in an interview. You better be confident that you will be making this candidate an offer, and if you are, then you better be
damn sure it doesn't sour his or her experience.
I work in an industry that is considered "young" and "fun", and your idea would be met with a collective and deafening groan. It's not 2006 anymore. We grew up and put the games away. Companies and their interview processes are being judged by how they respect candidates and their time.