My extended family--14 people, ranging in age from 10 to 81, spending a week on Chesapeake Bay--will be invading DC two weeks from today. We've rented a bus and driver for the day. We need restaurant recommendations for dinner. We want a place that'll take reservations, and can handle 14 without too much stress. Price is not a big issue, but we don't want to sock it to grandpa too badly, either. Cocktails and wine are a must! No chains, please, but a menu with lots of choices is probably ideal.