[Grey]

issparringzone is only to check if the level is a sparring zone.

if (issparringzone) {
//dostuff
}

Sparring zones are set as Dusty says, but with just 'sparringzone' on its own in an NPC instead. As far as I know there is no way of setting a partial sparringzone in a level (such as inside the sparring area) though you can do something like checking the player's x and y and if it is in a certain area then enabling weapons, otherwise disabling them instead.