Jim
An Irish friend of mine told me, of course we have a class system - it's just, we're a lot more subtle and sly than the English. Its sort of game - in a roundabout way, you get asked which people you know in your area, and which places you've been. From this they can work out if you know anyone who's worth knowing, and from that if you're worth knowing!

So try not to give your humble origins away.