You have 3 options.
1. Both hands up (bent at the elbows)
2. Both arms pointed to your left
3. Both arms pointed to your right
Stand with a partner.
Count 1 2 3 then leave your arms in one of the positions.
If you and your partner match you win. If not you lose. Move on.
It’s like a scissors paper rock. While the two of you are winning stay together. If losing move on.