Where do 40 year old Chicagoans hang out?

Hey all! Recently divorced, 40 year old mom of a 7 year old here - wondering where the other 40 year olds hang out these days as I’m trying to meet and make friends. (Also saying these days as since you might imagine having a 7 year old, it’s been some years since I’ve “hung out”.) If it helps at all, I really love comic book shops, bookstores, and checking out new restaurants.