Thank you for your question. Unfortunately not, that restaurant (Chesapeake Grill) has been turned in to meeting space. We do offer dinner service on the second floor of the hotel in our current restaurant, Cinnabar.
Yes, I believe so but I never ventured that far! The bar on level one does small snack food and the restaurant on level two is excellent.
Get an answer from Hyatt Regency Crystal City at Reagan National Airport staff and past guests.