Scenario:

You arrive at a degustation type eating venue with a set menu (think Christmas party type function) with your father and some other friends/family.
You and your father get ahead of the queue and get a table.
He hands you a bottle of wine, asks for it to be opened so it can breath, and from the way he handles it you believe it represents some value to him, but you haven't assigned it any.

You open the bottle and then start to wonder where everyone in your party's gone.
You leave the table and try and find them.
5 minutes later you return to your table and it seems somebody has taken your table and started to drink the wine.
There's nobody at the table but there's a handbag on the floor and wine glasses with wine in it.
1 minute later a couple with a kid return and from their look they seems puzzled why you're there.
You explain to them that you were originally here and left the wine to breath.

They apologise but don't make any effort to leave.
You call over a waiter and ask for a new bottle of wine like the one on the table... the waiter say's sorry we don't have any wine like this, that's a special 1997 Dominio de Pingus.

What do you do?