7 up

Sit the group in a circle
Count around the circle 1,2,3,4,5,6,7. On each number the person simply points with their hand in the direction the count is going.
On 7 the person must point in the same way but with their hand above their head.
If they want they can also reverse the direction.

Progression:
You can get the group to keep counting upwards and the hand must then be raised above the head on 7 and multiples of 7
You can introduce fists on 5's or multiples of 5, which can be holding both fists out in front of your body and this can be used to reverse the direction.
Fists and pointing must be done with one fist out and a hand pointing above the head where you get a number that is both a multiple of 5 and 7.
The game can also be played silent (not counting out loud) with only the hand gestures.