Here is a list of One Minute Training Games without Props/Equipment. It is short and quick. Very useful for sales, customer service and life coaches and trainers.
8 with Hands, 6 with Legs
In the sitting posture, make participants write the numbers in the air, number 8 using hand, number 6 using leg, at the same time.
Games without Props Examples
5 Dance Steps in GroupsA group of participants perform 5 (or 10-15) dance steps, all at once, without slip-up. The more dance steps the team performs in groups, the winner.

Games without Props - Group Dance