As the weather gets cooler and the holidays approach, many of us are having to navigate totally new etiquette dilemmas because of COVID-19: How do you figure out Thanksgiving when your friends and family have precautions are different than your own? Or curtail the guest list because you're worried about social distancing? How do you set the ground rules for your kid's playdate with a new friend? New York Times Social Q's columnist Philip Galanes shares his advice on some of these quandaries and takes listener calls.