USA
Las Vegas in summer is extreme heat (104-114°F regularly) paired with aggressively air-conditioned casinos. The city is built around two outfit categories: dayclub/pool and nightclub. Dress codes are enforced — sneakers and flip-flops are turned away at club doors; cover-ups are required to walk through casinos on the way to the pool. Bachelorette capital of the US; theme dressing is expected, not optional.