public OnPlayerDeath(playerid)
{
    if(PartyStarted == true)
    SetPlayerPos(playerid, -2666.7739,637.4879,14);
    SendClientMessage(playerid, COLOR_RED, "You have died in the event!");
    return 1;
}

new Float: posx[MAX_PLAYERS], Float:posy[MAX_PLAYERS], Float:posz[MAX_PLAYERS], bool: PlayerInEvent[MAX_PLAYERS];

GetPlayerPos(playerid, posx[playerid],posy[playerid],posz[playerid]);
PlayerInEvent[playerid] = true;

if(PlayerInEvent[playerid] = 1)  SetPlayerPos(playerid, posx[playerid],posy[playerid],posz[playerid]);

new
    Float: oldPos[ MAX_PLAYERS ][ 4 ],
    bool: inParty[ MAX_PLAYERS ] = { false, ... }
;

CMD:join( playerid, params[ ] )
{
    // Your actions/code in the command
 
    GetPlayerPos( playerid, pos[ playerid ][ 0 ], pos[ playerid ][ 1 ], pos[ playerid ][ 2 ] );
    GetPlayerFacingAngle( playerid, pos[ playerid ][ 3 ] );

    inParty[ playerid ] = true;

     return 1;
}

public OnPlayerDeath( playerid, killerid, reason )
{
     if ( inParty[ playerid ] )
    {
        SendClientMessage( playerid, -1, "You have died in the event, you left it." );
    }

    return 1;
}

public OnPlayerSpawn( playerid )
{
    if ( inParty[ playerid ] )
    {
        inParty[ playerid ] = false;

        SetPlayerPos( playerid, pos[ playerid ][ 0 ], pos[ playerid ][ 1 ], pos[ playerid ][ 2 ] );

        SetPlayerFacingAngle( playerid, pos[ playerid ][ 3 ] );
    }

    return 1;
}

// top of script

new InEvent[MAX_PLAYERS];

// in the event cmd or however the event is started

InEvent[playerid] = 1; // tells the server that the player joined in/is in the event (1 = true)

// onplayerspawn

if(InEvent[playerid] == 1) // if the player was in the event when he died
{
    // set the player position back to the event
    // other stuff here
    return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(strcmp(cmdtext, "/event", true) == 0)
    {
        if(!IsPlayerAdmin(playerid)) return SendClientMessage(playerid,0xFF0000AA,"You can't use this command.");
        {
        
            GetPlayerPos(playerid, pData[X], pData[Y], pData[Z]); 
            GetPlayerFacingAngle(playerid, pData[A]); 
            SendClientMessageToAll(COLOR_GREEN, "A Event has been started. Use /join to join the event.");
            PartyStarted = true;
            return 1;
        }
    }

    if(strcmp(cmdtext, "/join", true) == 0)
    {
        if(PartyStarted == false) return SendClientMessage(playerid, COLOR_RED, "No one has started a event yet.");
        if(AtParty[playerid] == true) return SendClientMessage(playerid, COLOR_RED, "You're already in the event, type /leave to leave.");
        SetPlayerPos(playerid, 2169.0952,-3170.2466,190);
        SetPlayerFacingAngle(playerid, 344.3667);
        AtParty[playerid] = true;
        SendClientMessage(playerid, COLOR_GREEN, "Welcome to the Event, if you wish to leave use /leave.");
        return 1;
    }

    if(strcmp(cmdtext, "/leave", true) == 0)
    {
        if(AtParty[playerid] == false) return SendClientMessage(playerid, COLOR_RED, "You're not at the Event.");
        SpawnPlayer(playerid);
        AtParty[playerid] = false;
        return 1;
    }