Travel east to Oak Park and travel south to the amphitheatre. Directionsįrom Chicago and the Northern suburbs, take I-94 East to I-57 South to I-80 West to Harlem. Located in the heart of the Chicago, Illinois, the Credit Union 1 Amphitheatre, previously Hollywood Casino Amphitheatre is a hugely popular venue, with an incredible seating capacity of 28,000! Locating the venue isn’t difficult with its central location.