I'm trying to stay in Chicago in the loop the last weekend in May for a getaway for me and Mrs. CF3. Dates are flexible, but we're planning our trip around the Royals playing in Wrigley. However, all the Hyatt, Hilton, and Marriotts are not taking reservations because of an oncology convention with 33k people. Is there a way around this? I don't want to stay out of the loop.