Mr. Hit (Ron) It is the best you will all see.
I learned this lesson in Ecole Philip Gaulier.  It is a good game for learning the names of a group, but it is also great (and very difficult) with a group whose names are already familiar to each other.
One person starts as Mr. Hit and announces "I am Mr. Hit!" Mr. Hit tries to catch another person, by walking directly (slowly, at first) towards him. One way for the intended victim is to avoid contact (but later people can not move so it doesn’t help much). Another way the victim can stop Mr. Hit is to call out the name of another person in the group before any contact is made or within few seconds from a contact. The Judge (me) will determine in cases of doubt. If he touches (hits) the person and no correct reply have been made within a short time, they are "out" and must leave the game.
Once a name is called out, that person instantly becomes Mr. Hit and begins advancing on a victim. He doesn't have to announce that he is Mr. Hit after the first time. Again, the only way the victim can save himself is by calling out a name.
The game is played until only two people are left. It gets harder and harder, because as people are "out" the fund of names grows smaller. You can't say the name of a person who is out--it must be someone who is still in the game. It sounds easy, but it isn't.
There are some small rules that apply as well:
If you are to say a name but you move your hands instead, you are out.
If the person whose name you say didn’t hear it clearly, you are out.
When only about 10-12 people are left the group stands in a circle, and people can’t move.
This is a great game!

The same game has a variation in which you mustn’t be touched before you say a name. But this small change makes it completely different game.
We can try it as well.

Catching 12345 (Ron)
One person is the catcher. Others are running away and when being caught become the catcher.
You can touch someone else and then the catcher can not catch you but he can counts 12345 and the group in front must separate.
Fun game.

Freeze Catching (Ron)
Two or three catchers depend on the number of layers. If the catcher catches someone the caught person freezes and stands with his legs spread apart.  A free player can unfreeze him by passing between his legs.
The catchers have to freeze all the people.

Threes (Ron)
Good for groups of N people N mod 3 = 2.
One person is the catcher, one, the victim, is running away. All the others stand in groups of three in a big circle. The catcher tries to catch the victim. When in danger, the victim can stand near one end of a group of three and then the last person in that group (on the other side) drops and becomes the victim.
If the catcher catches the victim, they replace duties.

Chairs

Musical chairs (Ron) 

Winking (Ron)
Chairs are ordered in a square. Behind every chair there is a person, and some chairs are occupied with people. If you are behind a chair and your chair is empty, you should wink to someone in a chair, in order to convince him to move to your chair. If while he tries to move, the person behind his chair touches him he should stay there and wait for a new wink.

Ball Games (a soft ball) 

Go! (Ron)
Circle and one in the center. People from the circle are throwing the ball to the person in the center. If someone says “GO” he replaces the central person.

Columns (Ron)
Few columns, in each column the ball is passing once from above and once between the legs from below. When the ball reaches the first person he runs to the end of the column with the ball. Until all the people are done.

8 Squares (Ron)
I’ll explain when we play.

The Murderer (Ron)
Without the knowledge of the rest one of the participants is being chosen as a murderer. All the people are walking in the area, and the murderer is winking at other people. I you have been winked at, you must die but only after few seconds (minutes) so not to expose the murderer. If someone thinks he knows who the murderer is he can come and whisper the name to the organizer. If he is right the murderer is exposed. Otherwise he is out as well.

Differences (Ron)
A group is preparing a “picture” with themselves (they stand in a certain position). The other group watches them very carefully for 30 seconds. Then the watching group close their eyes, and the presenting group changes just a bit, to create 10 small differences. Now the other group has to tell the differences.

Facts (Ron)
People are walking around, and forming pairs. Each one tells the other person 3 facts about himself. Two true ones, and one not. The other person has to guess the false one.