Hilton Washington. Continental buffet for all, as lounge closed at weekends during summer. Good selection. Upgrade for $5.
Douibletree Crystal City. Continental buffet for 2, or voucher for $13 credit. Again good buffet, $5 upcharge. Charged extra for son.
Doubletree Newark Airport Buffet for 2. Includes hot items, but limited choice and quality wasn't great, so became a Continental. Cooked to order eggs, pancakes, waffles not inlcuded in hot buffet.