You can celebrate Secret Santa Gift Exchange. You will find details of how to play this game.
5th December 2018 From India, Mumbai
You can also decorate your office and have a Christmas tree with small gifts around if the staff strength is small. Also an employee can be dressed up like Santa play quiz and give chocolate or gifts.
Also have a potluck along with some games and decide a dress code and colour to be worn on Christmas.
6th December 2018 From India, Mumbai