Talking to aggressive atheists can be enjoyable and fulfilling if you have an intelligent and creative spiel.
I was talking to an atheist builder who had a pop at me for being a Christian. He declared boldly: "I'm on the side of science and not religion."
I was straight in there. "Does that mean you agree with Eric Harris then?
The builder was puzzled and asked me: "Who is Eric Harris?"
I smiled inwardly and launched into my bespoke evangelism patter.