Washington DC Sunset Dinner Cruise with Buffet. Experience the Potomac River on a sunset dinner, dancing and sightseeing cruise, where you'll see Washington DC’s famous skyline from a luxury boat. As your journey down the river, you'll enjoy a delicious, all-you-can-eat buffet and an amazing DJ spinning your favorite songs. Book with us and Save 37%: Washington DC Sunset Dinner Cruise with Buffet.