I reserved my Model 3 at the Highland Park, Illinois store. A product specialist said at least 200 people had been there. It looked more like 300 to me when I left around 10:30 am CDT, a half hour after the store opening. An employee monitoring the queue said a lot more were at the Grand Avenue store on the near northside of Chicago, Illinois. I then drove for 15 minutes to the store at the Old Orchard Mall in Skokie, Illinois. Before 11:30 am CDT a product specialist told me there had been about 160 so far. They'll be open until 9:00 pm CDT and expect more during evening hours.
The person in front of me in the Highland Park queue drove down from Milwaukee, Wisconsin. The one behind me drove from Madison, Wisconsin. Tesla stores are outlawed in Wisconsin. A Highland Park product specialist anticipated that the online reservations this evening would far exceed all of those made in stores.