The Chicago Marriott Northwest offers over 12,000 sq.ft. of event space for your next meeting or special event. From small forums to extravagant presentations, we have the perfect meeting space for your event. Our Prairie Stone Ballroom has 7,480 square feet of space and can hold up to 700 guests. Let our culinary team prepare customized meals inspired by the Chicago area. Our expert event planners are ready to take care of every detail to make your gathering a success.