Fair Grounds opened its first day under the new management of Churchill Downs Inc. on Thursday with a bang. The crowd of 7,465 that filled the grandstand to the brim was the third-largest attendance in the eight-year-old history of the new building. The packed house created the kind of shoulder-to-shoulder buzz among fans that recalls racing's glory days. It was a far cry from last season's gloomy opening day, which drew a much smaller crowd against the backdrop of long-simmering unrest from horsemen over a suit that would force the track into bankruptcy.