The Marriott Marquis is a short five minute walk from The Zephyr. Please use the following link to access the room block. https://book.passkey.com/event/50311578/owner/48979017/landing
The Renaissance is optimal for guests who want the Downtown Chicago experience. As an added bonus, it's walking distance from the Chicago Architecture River Cruise.
Another great centrally-located option. Located in River North, The Pendry is walking distance from the Chicago Architecture River Cruise as well.