Steam-off game best played with about 20 players
Players line up as if in relay formation - but with hands touching the hands of the players beside them. This creates the Streets.
By turning 90 degrees and touching the hands of the players now beside them, they now have the Alleys.
Two players are selected. One is the pursuer and one is the quarry.
The pursuer chases the quarry down the Streets.
Neither may break through the arms of those forming the Streets.
The leader calls 'Alleys' and the players turn to form the Alleys.
This can change the situation dramatically.
Runners should be changed every minute or less to give runners a break and everyone a chance to run.
(from Scouts Canada 'Games from A to Z' page 278)