Glen Grove is a decent facility for being so close to downtown Chicago. There are 90 stalls and multiple businesses being run out of the facility. They have a trainer for people looking to go to larger shows and instructors to teach people doing this once a week.
The lesson program is huge with a wide variety of lesson horses. (in response to the other comment...the lesson horses are turned out every day and working students are assigned to them each day to make sure they are groomed and put away properly.)
The trainers are organized and provide a training program for each owner/horse. The vet care is also fantastic for both private horses and lesson horses.
i recommend this barn if your looking for a convenient and well run place close to downtown.