Last time I stayed there (which admittedly has been a few months back) the CL was not open on the weekends, although I do not remember if they give breakfast coupons or not (I'm inclined to say no, but I'll admit I don't particularly remember). If I may make a suggestion though, if your rate is not significantly lower at the Marriott O'Hare might I suggest trying to Marriott Suites or Renaissance Suites, both also O'Hare properties, and both offering a complimentary shuttle to and from the airport. There's nothing particularly bad per se about the Marriott, but the rooms are extremely dated, and there were some carpet issues with the room I was offered. I have stayed at all three, and my preference is the Renaissance Suites O'Hare but the Marriott Suites is a fine property as well.