The best of the batch for bourbon Christmas singing hails from Bob’s Burgers, a secret source of novelty music of every ilk. “The Spirits of Christmas” may ostensibly be about all merry drinking, but it doesn’t take a whole minute of listening to realize slumlord Mr. Fischoeder (Kevin Kline) has a favorite. Those who watch the end credits of the series will get why brother Felix has to skate in and out of frame the entire song.