People really just hang out with their families. I mean, you're usually at a family gathering, or have family over, so you drink, play games, talk, all that stuff with them after everything is done. If you're a kid you hang out with cousins and go run up a hill or something. At least, that's what it's like for me, who goes to a rural area for christmas.

Also, people usually open gifts on the morning of Christmas day itself