Momcat, the Cubs are playing the White Sox. They used to do this for one game each season as a charity event before inter-league play started. They'd switch off each year between Wrigley Field and Comiskey Park.
Be sure to remind all of your fellow kitties to bring their sunglasses. Also, you might want to ask anyone who has an extra baseball glove to bring it so everyone will have a chance to catch a foul ball.
Kitties: What Momcat said! Cassie will have the binoculars she got for the Belmont Stakes so everyone can catch the outfield action. The skybox has its own balcony so we can sit either indoors or outdoors, depending on the weather. All three games start at 7:10 PM and the kitties can go to one, two or all three, depending on what else the kitties want to do while you're here in Chicago.