What a great idea. Whether or not it comes to fruition tells me a lot about you ... info I wouldn't receive if we were trying to yell above the din at a typical event.
I definitely am an introvert, but have managed to live, work, and love in a world enriched by extroverts. My girlfriend is a blazing extrovert, which brings on all sorts of challenges. But that's another thread...
I think an Event 'aimed' at introverts would translate into an environment with less external stimulation which can sometimes flood introverts. Perhaps this would mean an environment which is not so public & noisy, and fewer people, i.e. less than 20? And the label would be important too, i.e. instead of it being aimed at 'introverts' perhaps the theme would be a 'low-key' approach to building and experiencing relationships. Or some other languaging.
I just re-read what I wrote and smiled. I'm really not into such rigid definitions! Really I'm not! In any case, I'd love to come and see who shows up.