The Hollywood Casino Amphitheatre can accommodate up to 7,000 reserved seats with another 13,000 lawn. The Hollywood Casino Amphitheatre was constructed for approximately $12 million and opened Jwith a Steve Winwood concert. The Hollywood Casino Amphitheater box office is located at 14141 Riverport Drive in Maryland Heights, Missourri. Louis to catch the touring summer concert series. The Hollywood Casino Amphitheater is the premier spot in St.