What to Avoid: The term "business" is an important addition to this category. While the sleek jeans you styled for a casual dinner can be considered acceptable in certain business settings, focus on a chic pant to err on the side of caution.

What to Wear: Business casual, though it may seem obscure for a restaurant, is easy to understand as it's what one would typically wear to work. While that concept can become a little hazy for the fashion girl who wears trendier outfits to the office, the idea is to maintain a professional, appropriate, and elegant appearance. Imagine the outfit you would wear when taking a client out to lunch. Personally, this brings to mind a tailored pant, oversize blazer, and graphic tee with a pair of simple oxford loafers. Sophisticated and stylish, but not overly stuffy.