I don't class this as a party trick really but I do work as a Spiritualist Medium/Psychic Advisor
. I am a Intuitive psychotherapist and I do provide party services. Explaining this when people ask me what I do for a living usually ends up in me giving them some kind of demonstration of my psychic work. And yes even the skeptics are curious enough to ask.
Usually they ask: OK what do you see around me? What can you tell about me and so on.
So I ask them for something I can hold and give them a bit of a psychometric reading. I usually freak them out and make them think when I do answer.
Some other people who are not so brave want to know what I understand the afterlife to be like. They want to share their own psychic and intuitive experiences and this always leads to interesting discussions.
I used to be shy and never knew what to say at parties. Who knew that at this point I would be the entertainment!