I have a friend visiting next weekend and I am using it as a excuse to try another restaurant on the Washingtonian Top 100 List. I've narrowed it down to four restaurants for two nights: Locanda, Dino, Proof and PS7s. If I had to pick two based on food and atmosphere, what would your suggestions be? We are two early 30-somethings looking to catch up over some good food in a relaxed environment. Menu should include some not so crazy items for my friend (steak or chicken is usually a good bet).