Christmas Cards for Every Employee
One very simple idea at Christmas is to give a Christmas card to every employee. This both highlights the existence of your group, and shares a message of hope.
There are a wide range of cards available on line. One group used the card shown which has a powerful message of hope about the true God of Christmas, but was not too pushy with the gospel.
You might choose something a little more direct, or perhaps not so direct. Remember to discuss what you plan to do with your manager/HR department first.
A great way to make this have even more impact is to personally sign every card. You can preprint some labels saying "Happy Christmas from the Christians Fellowship Group" but signing them shows you have taken some effort.
It is good to pray over the cards before distributing them to everyone in a suitable way.
The specific card shown is available from the Christian Publishing and Outreach website