NWScript:

// Script Name: Cheers (Area OnEnter Event script)
//
// This purpose of this script is to have the NPC's to recognize and greet them
// when they enter a bar (or any other area...)
//
// There are two scripts needed.  The first is used on the "OnEnter" Event of the area.
// The second is placed on the OnPerception event of each patron who will recognize PC's.
//
// It uses the name of the PC as a Local for each NPC, so every time you enter the area,
// you will receive a warm greeting where everybody knows your name.  Norm!!!
// by Chaz Mead
void main()
{
    object oPC = GetEnteringObject();
    string sName = GetName(oPC);
    int i = 1;
    object oCustomer = GetNearestCreature (CREATURE_TYPE_PLAYER_CHAR, PLAYER_CHAR_NOT_PC, oPC, i);
    while (GetIsObjectValid(oCustomer))
    {
        SetLocalInt(oCustomer, sName, 0);
        i = i + 1;
        oCustomer = GetNearestCreature (CREATURE_TYPE_PLAYER_CHAR, PLAYER_CHAR_NOT_PC, oPC, i);
    }
}

NWScript:

// Script Name: Cheers (NPC OnPerception Event Script)
//
// This purpose of this script is to have the NPC's to recognize and greet them
// when they enter a bar (or any other area...)
//
// There are two scripts needed.  The first is used on the "OnEnter" Event of the area.
// The second is placed on the OnPerception event of each patron who will recognize PC's.
//
// It uses the name of the PC as a Local for each NPC, so every time you enter the area,
// you will receive a warm greeting where everybody knows your name.  Norm!!!
// by Chaz Mead
void main()
{
    object oPC = GetLastPerceived();
    string sName = GetName(oPC);
    int BarState = GetLocalInt( OBJECT_SELF, sName);
    if (BarState < 1)
    {
        switch(Random(4))
        {
            case 0:
                ActionSpeakString ("Hello " + sName + "!");
                break;
            case 1:
                ActionSpeakString ("Hey there " + sName + ".");
                break;
            case 2:
                ActionSpeakString ("Welcome back " + sName + "!");
                break;
            case 3:
                ActionSpeakString (sName + "!!!");
                break;
        }
        SetLocalInt( OBJECT_SELF, sName, 1);
    }
}