What is black tie optional for a man?

Black tie optional typically means that men can either wear a tuxedo or a dark suit. If a man chooses to wear a tuxedo, it should be a traditional black tuxedo with a black bow tie. If he opts for a dark suit, it should be in a dark color such as navy or charcoal, paired with a dress shirt and tie. It is important to ensure that the suit is well-fitted and in good condition. Additionally, black dress shoes are recommended for both options. Overall, the key is to dress elegantly and in a formal manner while still having some flexibility in the choice of attire.