I am an athiest!

If they ask, yes, tho where I live that isn't a common question. If I'm discussing religious issues it isn't hard to tell I'm a non-believer even if I don't say so.

I don't unless they ask and then I say either,' I am atheist' or 'I have no god' .
Depending upon their answer I either stay to chat a bit or get off

Depends on the tone of the conversation and whether I am asked or not. I have no problem telling people what I believe but I have a slightly more tactful way to put it if I feel it may be offensive to come right out and say I don't believe in God or religion. I mean I will tell some I am atheist or agnostic but if I don't feel like it is a theological discussion or sharing of ideas and beliefs I prefer to say something like below.
I generally say something like God has not yet graced me with his presence but I don't feel like I am lost

Let the discussion first moving and after few exchanges, the other guy will eventually found out you are not a Christian believer. And that makes the discussion interesting for me without deviating from the topic.

My advice is move! Run!! Dont let em get ya?