My company has decided to hold its Christmas luncheon at a restaurant this year on Friday. We will go from the office to the restaurant at lunch time. Not sure what to wear - we never had a Christmas lunch outside.

Will straight/skinny dark-wash jeans and a nice sweater do? Or are jeans not a good idea? Or is that too boring? Could I wear a scarf with the sweater or is that not appropriate for a lunch at the restaurant?

I don't think it is a dress-up type of lunch since no dress code was listed. Plus we do have casual Fridays at work. What would you wear ? Or could you point me to links here on YLF or elsewhere for ideas. Thanks for all input!