install an area like the Budweiser Terrace at Busch Stadium.
http://i0.wp.com/securea.mlb.com/assets/images/6/6/8/273828668/cuts/1284x722/cut.jpg?resize=1170%2C658&ssl=1
An open, standing room only, type area, available to all fans, in a casual, mingle environment with high top tables and bar stools etc..