Chicago 12/05: Restaurant smoking ban effective January 16, 2006. Smoking will be allowed in free-standing bars and taverns and within 15 feet of a restaurant bar until July 1, 2008. Establishments that install air cleaning equipment that significantly improve air quality by venting smoke will be able to apply for an exemption to the smoking ban. (But Chicago aldermen are currently attempting to eliminate ventilation loophole)
Cook County 03/06: Cook County approved a smoking ban that will impact bars, restaurants and many other indoor public places in more than 100 suburban communities. It takes effect March 15, 2007, and: impacts any Cook County town that doesn't have some kind of smoking ordinance. (Municipalities can pass less restrictive laws until 03/07)
Thanks for the information.