DRESS LIKE A BOSS AT YOUR OFFICE HOLIDAY PARTY. First of all, you’re not going to be in a work setting, so there’s most likely no official dress code. If you can, try to use the rule “office dress code minus one.” For example, if your office dress code is business professional then dress business casual for the party. If your office dress code is business casual, wear a nice dress or even dark jeans. Make sure you don’t wear anything too low cut or sheer, as this is still a work event.