But when it came time in the Zoning Committee to consider the change to the planned unit development for the parcel, Northwest Side Ald. Margaret Laurino, 39th, requested a roll call to see whether there were enough aldermen present in the meeting to have a quorum. It’s a common tactic used by aldermen to stop votes from taking place, and Laurino, who’s retiring in May, was clear about the fact she sought a delay. “I don’t feel like there has been enough discussion on this issue,” she said.