This dress code in high society is considered informal.
Informal may sound casual and it is compared to White Tie
and Black Tie
, but it normally refers to a respectful standard of dress. Typically Lounge Suit
and Cocktail Dress
are worn to such events.
In very relaxed events it might mean Smart Casual
, but generally, unless you know for sure it is best to stick to the dress code, to present a sophisticated image to new people you may meet. It's always better to be overdressed than underdressed.