A very merry continue-the-courtship night to you!
Okay, this one isn't exactly at home, but it is cheap and one you can do if you have small children.
Go Christmas Caroling!
You don't have to go far. Just bundle the kids up and sing 2 or 3 Christmas songs to your neighbors and friends.
Finish it off with some hot cider or chocolate and cuddling by a fire or favorite Christmas movie.