The Workshop will be held at the Congress Plaza Hotel in Downtown Chicago, IL.
Hotel accommodations in the meeting hotel have been arranged at a rate of $159/night single or double ($20 per extra person). You may go directly to the online reservations page, or you can call the hotel yourself. For the latter, you may call the hotel at 1-312-427-3800 to make reservations. Make sure you tell them that you are making a reservation in the Mercury Workshop room block.
At the time the meeting was booked, this hotel rate was one of the best in downtown Chicago. There are, however, several other major hotel chains within walking distance of the meeting site.