[bigcomfycouch]

Код:

static gTeam[MAX_PLAYERS];

new GrovePeople;

#define GROVE 1

public OnPlayerRequestClass(playerid, classid)
{
	if(gTeam[playerid] == GROVE) GrovePeople--;
	if(classid == changethistoagrovestreetskin)
	{
	  if(GrovePeople > 3)
	  {
	    SendClientMessage(playerid, COLOR_RED, "You cannot join this team because it is too full.");
	    return 0;
	  }
	  else
	  {
	    GrovePeople++;
	    gTeam[playerid] = GROVE;
	    return 1;
	  }
	}
	return 1;
}

it's not the most efficient code, not even sure if it works