For general audiences, I do:
Blue Christmas
White Christmas
Christmas Song
I'll Be Home For Christmas
Please Come Home For Christmas {essential around here}
Pretty Paper
I Saw Mommy Kissing Santa Claus
All I Want For Christmas Is You (Thanks DNJ)
Grandma Got Run Over By A Reindeer
Rockin' Around The Christmas Tree
Jingle Bell Rock
Have Yourself A Merry Little Christmas
Silver Bells
Christmas In Dixie
Winter Wonderland
Let It Snow, Let It Snow
Felize Navidad/We Wish You A Merry Christmas
Christmas Time Reminds Me Of You (original)

When appropriate:
Jingle Bells
Rudolph
Frosty The Snowman
Santa Claus Is Coming To Town
Silent Night
Oh Holy Night

The religious ones are not for dances and clubs of course. Naturally you don't do sad ones for Nursing Homes.
Merry Christmas and Happy Holidays to all.
I have lyrics/chords for most of these. Let me know if you want some.
DonM