It is a casual sport not played formally, but often found on British summer camps.
Crocker is played between two teams of undefined size, typically between 10 and 50 per side.
Alternatively, a lack of skill on the side of one team may be made up for by a numerical advantage (for example in the case of many children playing against fewer adults).
Often taking place on large, flat, grassy school fields, a crocker pitch may not have defined outer limits.
A generally agreed setup will involve a semicircular bowling and batting area usually marked out with cones.
Behind the stumps stands a fielding player, or sometimes two; this position is usually called the wicket-keeper.
In the general case, apart from the batsman, none of the batting team is allowed on the field of play.
Their role is to count the runs and to uphold the rules and make decisions during the game.
This is most likely to do with the length of the game; with the potential for over 100 batsmen in a match the emphasis is on speed and participation of everyone.