A variation of hide & seek. This works best with at least four players, but the more the merrier.
One person goes to hide somewhere within the agreed boundaries and everyone else in the group counts to ten, twenty, a hundred to give them a chance to get away, and pretend they are not peeking.
The group splits up, and each person goes looking for the person in hiding.
If anyone finds the hidden person, they must join them. The next person to find the hidden pair, has to join too. This carries on until there is only one person left looking, and everyone else is piled into the same space, trying not to make too much noise.
If you are choosing the hiding place, be sure to consider the numbers who will have to fit in with you. A wardrobe is not a good place for more than about 3 people, even if they are good friends.