A high-level pow wow of City of Falls Church department heads, business leaders, developers and downtown residents is slated for the City Hall’s Training Center Tuesday afternoon in a meeting that promises to be “interesting.” The subject is the City’s plans to reduce the number of lanes on Route 7 (Broad St.) in its downtown area to a single lane in each direction from 7 a.m. to 7 p.m. for an eight-week period beginning this month. So far, City officials have refused to consider doing the work at night because, according to City Manager Wyatt Shields, of the inconvenience it will create for a handful of residents whose homes face onto or are nearby block between Virginia and Pennsylvania Avenues.