Hmm. One Baha'i temple, one Buddhist temple, and eight Protestant churches of various types - not all that interesting. These are only on this list because someone used the word "cult" in a comment on each house of worship's page and I found similar results searching for "cult" in other major cities.
I mostly just think it's funny that through a series of automated flukes, this is Google's top search result for "Chicago cults". The first fluke being that Yelp's SEO factory backend generated a page dedicated to the best local cults in Chicago, and the second that Google thought it was the best search result.