Most sexual assault (93%) is committed by a single criminal, but in case you want to be ready for multiple attackers, here's the self defense course for you.
IMPACT Defense Against Multiple Assailants
October 17 & 18 (Sat/Sun 11 a.m. to 5 p.m.)
3145 W. Pratt
Chicago, IL 60645
IMPACT Chicago offers this course every other year to provide practice with strategies, techniques and attitude to deal with two or more attackers. It builds on what IMPACT graduates already know (using voice, fighting spirit, adrenaline management, etc.). That means you have to have already taken the IMPACT core self defense course they offer throughout the year, so I encourage you do to that, if you haven't already.
Contact their registration coordinator, Tara Brinkman, at firstname.lastname@example.org to discuss a payment plan. Go to the IMPACT Chicago website for information on other self defense courses. I live alone in a violent city, but I don't worry because I've had training from IMPACT Chicago.