Unless you're in a bar.
Or a gov't building.
Or a school / preschool / child care facility.
Or a hospital / mental health facility / nursing home.
Or on public transportation.
Or at any public gathering and other special events open to the public.
Or any building that has received a Special Event Retailer’s license.
Or a public playground.
Or a public park or athletic facility.
Or the Cook County Forest Preserve District.
Or a gaming facility.
Or a stadium.
Or a library.
Or an airport.
Or an amusement park / zoo / museum.
Or a business with a No Guns sign.
Or someone else’s private residence, unless you have the owner’s permission.