First of all, every Christmas party needs to start off with something fresh that will get the guests going (this song is especially essential if your Grandparents are there):
Next, I suggest something the whole family is familiar with, something more mainstream since your tastes aren't necessarily theirs:
Then you gotta play SOME of those Christmas songs that you are a little annoyed of hearing every year but are still essential to play:
Play some of the above music for a while, play the songs once, twice, or 10 times if you're short on music (Grandma will love that). End with something heartwarming that says "thanks for coming but its time to go":
I don't think they are for everyone, but the government should really cool it on marijuana restriction. People should be able to choose there, and also I think if the drinking age was 18, there would be a lot less problems in the area of teen drinking.