An informal meetup of information security professionals in Chicago. Unlike other meetups, you will not be expected to pay dues, "join up", or present a zero-day exploit to attend.
Aberdeen Tap, at Aberdeen and Hubbard just off Grand, nearish the Grand Blue Line stop and the Morgan Green Line stop, in the west loop.
ChiSec is May 1, and generally the first Wednesday of every other month. We stay until people get tired of hanging out. That seems to be about 3 hours.
It fills a gap. In other cities, there are regular professional meetups. Chicago has ISSA and 2621. We're less formal than ISSA. Nobody takes minutes. We just try to get to know the locals in our field.