A group of about 12 will be taking a tour of the 6th and I Synagogue on a Sunday morning. We'll be taking the metro together, so we need something in walking distance. One of us travels by scooter so restaurant needs to accessible. We are a mixed group - some foodies, one on a strict diabetic diet, a few kosher, but will eat vegetarian, etc. Given all this, any suggestions for someplace wonderful but not really expensive?