The Quintessential Careers website recommends dressing conservatively, even more so than the dress code in the workplace. Don't assume you can show up in jeans and a hoodie just because the business is casual. Err on the side of safety. Ladies, keep the necklines modest, the jewelry at a minimum, the hemlines decent and the heels low. Gents, keep your pants belted at the waist and the shirts buttoned. Make sure your clothes are clean and pressed, and have an adult give you the once-over before you step out the door.