I’d say smart casual or casual would do. You see a lot of very sharply dressed people on the street here, though. For men, the same should go I guess, depending on the company and the level. I’ve even seen men show up in their work overall on a gala dinner party, where I myself felt completely overdressed in my nice evening dress while the other women were wearing their winter coats and woolen hats because of the cold… A friend once was invited to a business dinner in a spa, and people thought it was very weird she would not buy a bathing suit at the reception desk to join in the fun… Once I wore a pant suit to a meeting and people were intimidated by it, thought I was the director of some expensive business or so.