So just for fun and for the sake of this Dandygram (plus, who doesn't like a new word?), let's call this interesting comment the "intrement" (interesting + comment, pronounced: EN'tre'ment).
In DC, however, there are high expectations from others to be interesting because DC is an epicenter of the world. DC is not a financial epicenter (h/t New York City), a fashion epicenter (h/t anywhere else, Earth) or even an emotional epicenter (h/t Middle East, India, et. al), but DC does possess worldly and legitimate recognition as an epicenter of the interesting and intellectual.
So perhaps, DC has a higher rate of intrement per capita than other cities in the United States, and one might argue this because of how Washingtonians engage with other intellectuals in the city in most initial conversations. For instance, Washingtonians:
Fein for intrement of others. Draw intrements out from others. And naturally seek intrement in others.
Though DC is not financially rich (Congress is broke), fashionably inclined (read: "Ugly Hollywood"), or emotionally sound (these shortcomings abound!), DC will always have a lot of interesting people.
I'm not gushing, nor am I bragging about DC, but in my three years in DC, there have been numerous intrements around the following topics (I'm surely missing a few):
At the end of the day, whatever the noun or adjective used, an intrement will strike when least expected. And when it does, you will hopefully find an unsolicited and unprompted interest in what was said, and a newfound interest in that person.