Group formation

The game master determines the criteria according to which the people in the room should form groups.

It says for example:

Everyone will form groups,

with the same eye color,
who have birthdays in the same month,
with the same number of siblings,
the same colour of the T-shirt,
of the same zodiac sign,
who have birthdays in the same decade,
and so on
This warm-up game is especially suitable for groups who do not know each other very well.

Variation

The players do not form groups, but line up in a line sorted by a certain criterion, for example:

according to the size
according to age
according to hair colour (light - dark)
everyone hums any tone, then set up according to the pitch
and so on