for a game im sure you could think of a nice adaptation to the pin the tail ont he donkey
perhaps with santa or something.
spin the bottle haha
perhaps a dance contest. you could have different categories like sexiest dance, raunchiest, worst, etc.
have everyone pick an alter name like the strippers do. stage names. and call everyone by their stage name.
uuuummmmm.....dirty pictionary, strip poker.
need something christmasy...santa cookies decorated...naked haha. oh gosh.
i cant think of anything else!