More than 400 pickleball players are competing in a national tournament hosted in Forest Park this week. The tournament highlights the growth of the sport in the area that includes permanent courts in seven south St. Louis parks. A former Bed Bath & Beyond in Lake St. Louis is among the area’s newest pickleball venues and two more are expected to open this year. Mike Chapin, who runs St.LouisPickleball.com, discusses the St. Louis area’s pickleball explosion.