When I visited Chicago I went here......
Dojo Ryoshinkan Dojo (single)
Distance: 27 miles (Northwest of chicago, IL)
Address: 2019 N. Rand Road; Palatine, IL 60074 (Map)
Country: United States
Instructors: Glenn Iwaoka, 2nd dan
Phone: (847) 358-1530
Fax: (847) 358-1597
Schedule: M-F 6-9pm; Sa 11am-4pm; Su 8am-12pm
I really enjoyed my visit and they are really good to work with.
Hope you find what you are looking for.