San Francisco (AP) -- A daylong work stoppage during which employees were encouraged to "call in gay" to express support for same-sex marriage drew spotty participation nationwide Wednesday, with some gay rights activists praising the concept but questioning its effect. In San Francisco's gay Castro district, residents and merchants said they endorsed the message behind "Day Without a Gay" but didn't think a work stoppage was practical given the poor economy and the strike's organization. "If we are going to make a huge impact and not be laughed at, then we have to take the time and make the time...