THE SIDELINES : Cubs to Fight Peek-a-Boo Rooftop

Chicago Cubs President Donald Grenesko says he will block a private club’s venture of renting out space on a roof with a view of Wrigley Field for parties during ballgames.

Grenesko has asked the club’s architect to design a barrier aimed at blocking the club’s view of the park. But Grenesko says he wants to keep the barrier as small as possible to avoid penalizing residents of other buildings along Sheffield Avenue, whose rooftop viewing he calls “part of the unique charm and character of Wrigley Field.”

Grenesko objected to the club’s owners, ERTA Development, being allowed to operate as a nonprofit entity while charging for rooftop parties. “We think it’s just wonderful for the neighbors to go up on the roof to watch our games,” Grenesko said. “But when they start selling it and marketing it, they’ve just gone beyond the bounds of what’s decent.”