Against visiting American University, Georgetown’s play fit comfortably on a somewhat drowsy mid-holiday Saturday afternoon. The offense, which has generated 80 points in each of the Hoyas’ six consecutive wins, barely got to that number amid a flurry of turnovers. The defense, which has been enlivened if not dominant over the same stretch, looked sluggish, allowing the visitors to shoot 60 percent inside the arc. Georgetown was never really threatened, but took its sweet time to assert itself, trailing momentarily midway through the first half before compiling an extended push spanning halftime that put the game out of reach.