Four Oscar-winners redefine “sex in the Sixties” with the mildly ribald “Book Club,” a safe, mostly coital-free rom-com stocked to the rafters in gags rooted in the same sort of ageism Bill Holderman’s well-meaning flick attempts to squelch. The irony seems lost on all involved, as the director and his co-writer, Erin Simms, trade freely in the sort of stereotypes you’d expect from an enterprise intent on putting the “sex” back into [...]