N.J. Stat. § 4:15-7: Police jurisdiction of owner; liquor; gambling

For the purpose of preserving good order, peace and decorum upon and about farms or exhibition grounds and among the visitors and spectators to the same, the owner shall have police jurisdiction within the boundaries of any of such grounds. The owner shall not sell or permit the sale upon his grounds of any vinous, spirituous or malt liquors, or gamble or permit gambling in any form whatever upon the grounds.