According to this Wall Street Journal report on a Harvard Business School study, people confident enough to take a nonconformist attitude to social dress codes are perceived as more successful, so keep your sweats on all day:
Anyone who has felt like the odd duck of the group can take heart from new research from Harvard Business School that says sticking out in distinct ways can lend you an air of presence or influence.
Standing out in certain circumstances, like wearing sweats in a luxury store, also appears to boost an individual’s standing.
One obvious way people signal what the researchers called “status” is through visible markers, like what they wear and what they buy. Previous research has largely examined why people buy or wear branded items.
Less work has focused on what others think of those who try to communicate that they are different or worthy of attention. Efforts to be different are interesting because humans are wired to conform and be part of a group.