There are plenty of different ways to get here; and once you're here, to get around.
Air
Chicago is served by both O'Hare international Airport and Midway International Airport. Both airports have access to the CTA train system as well, so getting to and from the meet venue can be done without a rental car.
Train
Chicago is served by a major long-distance Amtrak rail center that has stops on 16 different routes. Grand Central Station is also linked into the CTA blue line for easy venue access.
We are also served by several Metra rail lines; which means that scummers living in the greater Illinois a; as well as scummers in Indiana or Wisconsin, can take the train in.
The CTA "L" system runs within Chicgao and a few suburbs.
Car
Driving is an option to get to us. Parking within the city is limited, but if you're willing to park your car in the suburbs then take transit into the city, parking can be relatively inexpensive. Check Google maps for the routes.
Uber is VERY big in Chicago. There's usually a driver within two minutes or less of you at any given time.
And of course, some of us CCCP-ers have cars, so a ride is always an option, depending.