Talk politics.

All of it, as a whole. Like I said it takes more than two to make a circle. Having said that, I don't necessarily view these "circle jerks" as bad, assuming of course that you don't limit yourself to discussions with people you have no disagreements. The term circle jerk makes it sound like a insult, you shouldn't be doing it, but really It just is a term that I think fits pretty well. You know, a bunch of people sitting around massaging their ideas off each other, making each other feel really good about themselves. That is essentially what people like to do, I'm just not much into it for whatever reason.