Present Perfect Punishment Party

Students sit in circles of between 5 and 10 students (it's flexible.)

Then they take turns clockwise asking the group their own present perfect questions, such as: "Have you been to Tokyo? Have you seen Kimetsu no Yaiba?" and so on.

Students usually have their own personal whiteboard, so they need to secretly answer the question by writing 'yes' or 'no'. After 15 seconds, or whenever everyone is finished, all students reveal their answers, including the student asking the question.

If a given student answers the same as the questioner, they are safe.
If a given student answers differently as the questioner, they are punished.

The optimal strategy therefore for a student is to think of something unique that they've done (such as visiting America) that not many other students have done to maximize punishment. But there's also a mind game involved for the students who answer, who try to guess what the asking student's answer is to avoid being punished. Watching the students think through this problem is fun.

Punishment ideas can be whatever you like, depending on your school and what classes you do. But I like to make a variety of tasks that are fun in their own right, such as:

1. 5 pushups/5 Squats
2. Sing their ABC's, days of the week, the hello song, or the months of the year
3. Read a section from the textbook.
4. Draw an anime character on the board.
5. Have a conversation with the JTE.

This requires no prep and could probably be adapted to other grammar points that are answered by 'yes I can' or 'no I can't.'

You can also give students a score based on how many students' they've punished, to help quantify the embarrassment they've inflicted on their cohort. You'll make sadists of them yet!